/* Standard Mode Refined (v3) - RESTORED */

/* ========================================
   Hero Text Animation System
   Japanese text is the "hero" when romanization hidden,
   gracefully makes room when romanization reveals
   ======================================== */

/* Spring easing for premium feel */
:root {
    --spring-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
    --spring-soft: cubic-bezier(0.22, 1, 0.36, 1);
}

/* Default state: Japanese text is HERO (larger, more centered) */
body:not(.focus-mode):not(.video-mode) .card-content:not(.romanization-revealed) .japanese-text {
    transform: scale(1.12) translateY(8px);
    transition: transform 0.45s var(--spring-soft),
                font-size 0.45s var(--spring-soft);
}

/* Revealed state: Japanese text makes room */
body:not(.focus-mode):not(.video-mode) .card-content.romanization-revealed .japanese-text {
    transform: scale(1) translateY(0);
    transition: transform 0.4s var(--spring-bounce),
                font-size 0.4s var(--spring-bounce);
}

/* Romanization container entrance animation */
body:not(.focus-mode):not(.video-mode) .card-content.romanization-revealed .romanization {
    animation: romanizationContainerEnter 0.5s var(--spring-bounce) forwards;
}

@keyframes romanizationContainerEnter {
    0% {
        opacity: 0;
        transform: translateY(20px) scale(0.92);
        filter: blur(2px);
    }
    60% {
        opacity: 1;
        filter: blur(0px);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
        filter: blur(0px);
    }
}

/* Mobile: Subtler hero effect (less scale to preserve readability) */
@media (max-width: 768px) {
    body:not(.focus-mode):not(.video-mode) .card-content:not(.romanization-revealed) .japanese-text {
        transform: scale(1.08) translateY(6px);
    }

    @keyframes romanizationContainerEnter {
        0% {
            opacity: 0;
            transform: translateY(15px) scale(0.95);
            filter: blur(1px);
        }
        60% {
            opacity: 1;
            filter: blur(0px);
        }
        100% {
            opacity: 1;
            transform: translateY(0) scale(1);
            filter: blur(0px);
        }
    }
}

/* ========================================
   Romanization Letter Animation (Standard Mode)
   ======================================== */

/* Romanization letters with staggered animation */
body:not(.focus-mode):not(.video-mode) .romanization .letter {
    animation: romanizationLetterType 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
    display: inline-block;
}

/* Preserve spaces in romanization */
body:not(.focus-mode):not(.video-mode) .romanization .letter.space {
    width: 0.25em;
    animation: none;
    opacity: 1;
}


/* ========================================
   Root Variables & Premium Tokens
   ======================================== */
:root {
    /* WIDER DRAWER for better legibility on laptops */
    --drawer-width: 420px;
    
    --bottom-bar-height: 90px;
    --top-bar-height: 90px;
    --hero-ease: cubic-bezier(0.2, 0.8, 0.2, 1);
}

/* ========================================
   Layout Restructuring - GLOBAL RESETS
   ======================================== */

body:not(.focus-mode):not(.video-mode) {
    height: 100vh;
    height: 100dvh; /* Dynamic viewport - excludes Safari address bar */
    max-height: 100vh;
    max-height: 100dvh;
    overflow: hidden; /* NO SCROLL */
    /* Fix background to viewport to prevent blue gaps */
    background-attachment: fixed;
    background-size: cover;
    /* Safe areas for notched phones (landscape) */
    padding-left: env(safe-area-inset-left, 0);
    padding-right: env(safe-area-inset-right, 0);
}

body:not(.focus-mode):not(.video-mode) .container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    height: 100%; /* Fill fixed body */
    padding: 0;
    width: 100%;
    overflow: hidden;
    box-sizing: border-box;
    position: relative; /* Context for absolute progress if needed */
    max-width: none;
}

/* Flashcard Container - The "Hero" Stage */
body:not(.focus-mode):not(.video-mode) .flashcard-container {
    display: flex;
    /* FLEX 1: Takes all available space between Top Bar and Bottom Bar */
    flex: 1;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
    width: 100%;
    padding: 0;
    /* Margins account for Top Bar flow (70px) */
    margin-top: var(--top-bar-height);
    margin-bottom: 0;
    height: auto; /* Let Flex handle height */
    min-height: 0; /* Allow shrinking if needed */
}

/* Flashcard adjustments - Responsive Scale */
body:not(.focus-mode):not(.video-mode) .flashcard {
    /* Responsive height: min 300px, prefer 65% of dynamic viewport, max 900px */
    height: clamp(300px, 65dvh, 900px);
    width: clamp(300px, 90vw, 1000px);
    max-width: 1000px;
    margin: 0 auto;
    transition: transform 0.5s var(--hero-ease), box-shadow 0.5s var(--hero-ease);
    position: relative;
}

body:not(.focus-mode):not(.video-mode) .card-face {
    height: 100%;
    width: 100%;
    padding: 30px;
    box-sizing: border-box;
    background: rgba(255, 255, 255, 0.95);
    overflow: hidden;
    display: flex;
    flex-direction: column;
    justify-content: center;
    /* FIX: Absolute positioning prevents layout shifts when toggling faces */
    position: absolute;
    top: 0;
    left: 0;
}

body:not(.focus-mode):not(.video-mode) .card-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    overflow: hidden;
    gap: 20px;
}

/* FIX: Ensure hidden faces stay hidden even with !important overrides */
body:not(.focus-mode):not(.video-mode) .card-face[style*="display: none"] {
    display: none !important;
    border: none !important;
    box-shadow: none !important;
}

/* FIX: Responsive Image Sizing */
body:not(.focus-mode):not(.video-mode) .vocabulary-image {
    width: auto;
    height: auto;
    max-height: 60%;
    max-width: 100%;
    object-fit: contain;
    flex-shrink: 1;
}

/* ========================================
   Top Navigation Bar
   ======================================== */
.hero-top-bar {
    position: fixed;
    top: 0;
    top: env(safe-area-inset-top, 0); /* Respect notch on iPhones */
    left: 0;
    width: 100%;
    height: var(--top-bar-height);
    padding: 0 30px;
    padding-left: calc(30px + env(safe-area-inset-left, 0));
    padding-right: calc(30px + env(safe-area-inset-right, 0));
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    pointer-events: none;
    background: transparent;
}

.hero-top-bar > * {
    pointer-events: auto;
}

/* Brand Icon (Left) — Red Hanko Stamp */
.top-brand {
    font-size: 1.5rem;
    cursor: pointer;
    transition: transform 0.3s ease;
}
.top-brand:hover { transform: scale(1.05); }

.hanko-logo {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: #C84B31;
    color: white;
    font-family: 'Klee One', serif;
    font-size: 14px;
    font-weight: 600;
    line-height: 1;
    box-shadow: inset 0 0 0 1px rgba(255,255,255,0.15), 0 1px 2px rgba(200,75,49,0.2);
}


/* Session Stats Pill (Center) */
.session-pill {
    /* FIX: Absolute centering to ignore side element widths */
    position: absolute;
    left: 50%;
    transform: translateX(-50%);

    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 50px;
    height: 56px;
    padding: 0 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    color: white;
    font-weight: 600;
    font-size: 1rem;
    box-shadow: 0 4px 15px rgba(44,44,44,0.06);
    transition: background 0.3s ease, box-shadow 0.3s ease, border-color 0.3s ease;
}

/* Right Controls */
.top-controls-right {
    display: flex;
    align-items: center;
    gap: 12px;
    height: 100%;
    transition: transform 0.4s var(--hero-ease), opacity 0.3s ease;
}

.icon-btn {
    width: 40px;
    height: 40px;
    background: rgba(44, 44, 44, 0.03);
    border: none;
    border-radius: 50%;
    color: #78716c;
    font-size: 16px;
    font-weight: 500;
    font-family: 'Inter', sans-serif;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    box-shadow: none;
    transition: background 0.2s ease, color 0.2s ease;
}

.icon-btn:hover {
    background: rgba(44, 44, 44, 0.06);
    color: #57534e;
}

.icon-btn:active {
    background: rgba(44, 44, 44, 0.08);
    transform: scale(0.96);
}

/* Header Quiz button - styled as premium pill, hidden by default */
.header-quiz-btn {
    display: none;
    align-items: center;
    gap: 4px;
    padding: 8px 14px;
    border-radius: 20px;
    border: none;
    background: #3D5A80;
    font-family: 'Inter', sans-serif;
    font-size: 13px;
    font-weight: 700;
    color: white;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(61, 90, 128, 0.18);
    transition: all 0.2s ease;
}

.header-quiz-btn:active {
    transform: scale(0.96);
}


/* ========================================
   Search Modal (DEPRECATED - Now using vocab-panel.css)
   Keeping minimal styles for backwards compatibility
   ======================================== */
/* Old modal styles removed - see css/vocab-panel.css */


/* Reset progress moved to account dropdown — see css/sync.css */

/* Chat UI styles moved to css/sidebar.css (loads globally) */

.sentences-panel-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(44, 44, 44, 0.5);
    -webkit-backdrop-filter: blur(5px);
    backdrop-filter: blur(5px);
    z-index: 997;
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    -webkit-transition: opacity 0.3s ease, visibility 0.3s ease;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sentences-panel-overlay.active {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
}

.sentences-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    top: auto;
    max-height: 75vh;
    background: #f8fafc;
    z-index: 998;
    -webkit-transform: translate3d(0, 100%, 0);
    transform: translate3d(0, 100%, 0);
    -webkit-transition: -webkit-transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    border-radius: 28px 28px 0 0;
    box-shadow: 0 -20px 60px rgba(44,44,44,0.15);
    overflow: hidden;
    overscroll-behavior: contain;
    display: flex;
    flex-direction: column;
    -webkit-overflow-scrolling: touch;
}

.sentences-panel.active {
    -webkit-transform: translate3d(0, 0, 0);
    transform: translate3d(0, 0, 0);
}

/* Chat Header with Onigiri Avatar - Warm Peach Theme */
.sentences-panel-header.chat-header {
    background: #f5f5f4;
    padding: 18px 20px;
    display: flex;
    align-items: center;
    gap: 14px;
    border-bottom: 1px solid rgba(44, 44, 44, 0.06);
}

.chat-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    /* Warm Peach */
    background: #fff7ed;
    border: 2px solid rgba(194, 65, 12, 0.15);
    box-shadow: 0 2px 8px rgba(44,44,44,0.06);
}

.chat-avatar img {
    width: 42px;
    height: 42px;
    object-fit: contain;
}

.chat-contact-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.chat-contact-name {
    font-size: 1.15rem;
    font-weight: 700;
    color: #292524;
}

.chat-contact-status {
    font-size: 0.75rem;
    color: var(--status-online-text);
    display: flex;
    align-items: center;
    gap: 5px;
}

.chat-status-dot {
    width: 7px;
    height: 7px;
    background: var(--status-online);
    border-radius: 50%;
    box-shadow: 0 0 6px rgba(var(--status-online-rgb), 0.3);
    display: inline-block;
}

.sentences-panel-close {
    background: rgba(44, 44, 44, 0.06);
    border: none;
    color: rgba(44, 44, 44, 0.4);
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-size: 1rem;
    font-weight: 400;
    cursor: pointer;
    transition: background-color 0.2s ease, color 0.2s ease, transform 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sentences-panel-close:hover {
    background: rgba(44, 44, 44, 0.1);
    color: rgba(44, 44, 44, 0.6);
}

.sentences-panel-close:active {
    transform: scale(0.95);
}

/* Chat Body */
.sentences-panel-content.chat-body {
    padding: 24px 18px 48px;
    overflow-y: auto;
    flex: 1;
    background: #fafaf9;
    display: flex;
    flex-direction: column;
    gap: 18px;
}

/* Chat bubble content styles moved to css/sidebar.css */

/* No content state */
.no-sentences {
    text-align: center;
    color: #9ca3af;
    padding: 40px 20px;
    font-size: 1rem;
}

/* Mobile adjustments */
@media (max-width: 768px) {
    .sentences-panel {
        max-height: 85vh;
        border-radius: 24px 24px 0 0;
    }

    /* Drag handle for swipe-to-close affordance */
    .sentences-panel::before {
        content: '';
        position: absolute;
        top: 8px;
        left: 50%;
        transform: translateX(-50%);
        width: 36px;
        height: 4px;
        background: rgba(44, 44, 44, 0.15);
        border-radius: 2px;
        z-index: 10;
    }

    .sentences-panel-header.chat-header {
        padding: 20px 18px 16px;
    }

    /* Larger close button for touch (44px minimum) */
    .sentences-panel-close {
        width: 44px;
        height: 44px;
        font-size: 1.1rem;
    }

    .chat-avatar {
        width: 44px;
        height: 44px;
    }

    .chat-avatar img {
        width: 36px;
        height: 36px;
    }

    .chat-contact-name {
        font-size: 1.05rem;
    }

    .sentences-panel-content.chat-body {
        padding: 18px 14px calc(60px + env(safe-area-inset-bottom, 20px));
        gap: 14px;
    }

    .chat-user-message {
        max-width: 75%;
        padding: 12px 16px;
    }

    .chat-user-word {
        font-size: 1.5rem;
    }

    .chat-onigiri-message {
        max-width: 90%;
    }

    .chat-bubble {
        padding: 12px 16px;
    }

    .chat-bubble-text {
        font-size: 0.9rem;
    }

    .chat-sentence-japanese {
        font-size: 1.1rem;
        line-height: 1.6;
    }

    .chat-sentence-english {
        font-size: 0.88rem;
    }

    .chat-sentences-list {
        margin-left: 32px;
        gap: 10px;
    }

    .chat-quote-content {
        padding: 14px 16px;
    }

    .chat-quote-number {
        width: 20px;
        height: 20px;
        font-size: 0.65rem;
    }

    /* Tap highlight for sentence quotes */
    .chat-sentence-quote {
        -webkit-tap-highlight-color: rgba(61, 90, 128, 0.1);
    }
}


/* ========================================
   Premium Progress Bar (Floating)
   ======================================== */
.premium-progress-wrapper {
    width: 90%;
    max-width: 600px;
    margin: 0 auto 10px auto; /* Spacing above bottom bar */
    display: flex;
    flex-direction: column;
    gap: 8px;
    z-index: 90;
    pointer-events: none; /* Let clicks pass through if tight */
}

.progress-header {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    padding: 0 4px;
}

.progress-label {
    display: none;
}

.progress-percent {
    font-size: 0.9rem;
    color: #fff;
    font-weight: 700;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
    font-variant-numeric: tabular-nums;
}

.premium-progress-track {
    width: 100%;
    height: 8px; /* Thicker than before */
    background: rgba(44, 44, 44, 0.2);
    border-radius: 10px;
    overflow: hidden;
    backdrop-filter: blur(3px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: inset 0 2px 4px rgba(44,44,44,0.18);
}

.premium-progress-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #3D5A80, #2C4A6E, #ff758c);
    background-size: 200% 100%;
    border-radius: 10px;
    transition: width 0.5s cubic-bezier(0.2, 0.8, 0.2, 1);
    animation: gradientFlow 3s ease infinite;
    box-shadow: 0 0 10px rgba(61, 90, 128, 0.3);
}

@keyframes gradientFlow {
    0% { background-position: 100% 50%; }
    50% { background-position: 0% 50%; }
    100% { background-position: 100% 50%; }
}

/* ========================================
   Bottom Action Bar (Flex Item)
   ======================================== */
.bottom-action-bar {
    /* Static positioning to participate in Flex Column */
    position: relative;
    bottom: auto;
    left: auto;
    transform: none;

    /* Fixed height to reserve space - increased for labels */
    flex: 0 0 110px;
    margin: 0 auto 20px auto; /* Bottom padding safe zone */

    width: auto;
    max-width: 95%;
    height: auto;
    min-height: 90px;
    background: rgba(20, 20, 25, 0.35);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.06);
    box-shadow: 0 8px 24px rgba(44, 44, 44, 0.1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0;
    padding: 10px 20px 8px 20px;
    z-index: 100;
}

/* Hover label strip - shows button info */
.action-label-strip {
    height: 20px;
    min-height: 20px;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.7);
    text-align: center;
    letter-spacing: 0.5px;
    transition: opacity 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 6px;
}

.action-label-strip:empty::before {
    content: "Hover for details";
    opacity: 0.4;
    font-style: italic;
}

.action-label-strip .label-name {
    color: rgba(255, 255, 255, 0.95);
    font-weight: 600;
}

.action-label-strip .label-desc {
    color: rgba(255, 255, 255, 0.6);
    font-weight: 400;
}

.action-label-strip .label-shortcut {
    color: #fff;
    background: rgba(61, 90, 128, 0.7);
    padding: 4px 10px;
    border-radius: 6px;
    font-family: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    border: 1px solid rgba(61, 90, 128, 0.9);
    box-shadow: 0 2px 8px rgba(61, 90, 128, 0.18);
}

/* Container for all button groups */
.action-groups-container {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 16px;
}

/* Individual button group */
.action-group {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

/* Group label above buttons */
.group-label {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 500;
    white-space: nowrap;
}

/* Buttons container within group */
.group-buttons {
    display: flex;
    align-items: center;
    gap: 4px;
}

.action-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.4rem;
    cursor: pointer;
    transition: background-color 0.2s cubic-bezier(0.3, 1.5, 0.5, 1), transform 0.2s cubic-bezier(0.3, 1.5, 0.5, 1), opacity 0.2s cubic-bezier(0.3, 1.5, 0.5, 1), box-shadow 0.2s cubic-bezier(0.3, 1.5, 0.5, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.14);
    transform: scale(1.08);
    color: white;
}

/* Content badge for More Info button */
.action-btn {
    position: relative;
}

.content-badge {
    position: absolute;
    top: 2px;
    right: 2px;
    font-size: 0.6rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.7);
    letter-spacing: -1px;
    pointer-events: none;
}

.content-badge.rich {
    color: #fbbf24;
    text-shadow: 0 0 4px rgba(251, 191, 36, 0.3);
}

/* ========================================
   Action Button Color Palette
   FULLY NEUTRAL - Only Mark buttons colored
   ======================================== */

/* All action buttons use neutral glass (inherits from .action-btn base) */
/* Navigate, Flip, Study, Mode, Shuffle - all neutral white glass */

/* Flip button - slightly larger emoji */
.action-btn.btn-flip {
    font-size: 1.5rem;
}

/* Quiz Button - Neutral glass with brightened emoji */
.action-btn.btn-quiz {
    font-size: 1.3rem;
    filter: brightness(2) saturate(1.5);
}
.action-btn.btn-quiz:hover {
    filter: brightness(2.2) saturate(1.6);
}

/* Mark Learned Button — moss green (semantic: learned) */
.action-btn.btn-known.active {
    background: rgba(163, 177, 138, 0.2);
    color: #a3b18a;
}

/* Mark Learning Button — gold (semantic: needs practice) */
.action-btn.btn-learning.active {
    background: rgba(201, 169, 110, 0.2);
    color: #C9A96E;
}

/* ========================================
   SPLIT PLAY BUTTON WITH DROPDOWN
   ======================================== */
.split-button-container {
    position: relative;
    display: flex;
    align-items: center;
    gap: 2px;
}

.split-button-container .split-main {
    border-top-right-radius: 8px;
    border-bottom-right-radius: 8px;
}

.split-dropdown-toggle {
    width: 24px;
    height: 50px;
    border: none;
    background: rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.7);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    border-top-right-radius: 25px;
    border-bottom-right-radius: 25px;
    transition: background-color 0.2s ease, color 0.2s ease, opacity 0.2s ease;
    margin-left: -8px;
    padding-left: 4px;
}

.split-dropdown-toggle:hover {
    background: rgba(255, 255, 255, 0.15);
    color: white;
}

.split-dropdown-toggle .dropdown-arrow {
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.split-button-container.dropdown-open .split-dropdown-toggle .dropdown-arrow {
    transform: rotate(180deg);
}

/* Play Mode Dropdown Menu */
.play-mode-dropdown {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(30, 30, 35, 0.95);
    backdrop-filter: blur(12px);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 12px;
    padding: 6px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateX(-50%) translateY(10px);
    transition: opacity 0.2s ease, visibility 0.2s ease, transform 0.2s ease;
    z-index: 1000;
    box-shadow: 0 8px 32px rgba(44, 44, 44, 0.24);
}

.split-button-container.dropdown-open .play-mode-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

.play-mode-dropdown .dropdown-item {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 10px 12px;
    border: none;
    background: transparent;
    color: rgba(255, 255, 255, 0.85);
    cursor: pointer;
    border-radius: 8px;
    transition: background-color 0.15s ease, color 0.15s ease;
    text-align: left;
}

.play-mode-dropdown .dropdown-item:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.play-mode-dropdown .dropdown-item.selected {
    background: rgba(61, 90, 128, 0.25);
    color: white;
}

.play-mode-dropdown .dropdown-item.selected::before {
    content: '✓';
    position: absolute;
    right: 12px;
    font-size: 0.9rem;
    color: #3D5A80;
}

.play-mode-dropdown .dropdown-icon {
    font-size: 1.2rem;
    width: 28px;
    text-align: center;
}

.play-mode-dropdown .dropdown-text {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.play-mode-dropdown .dropdown-title {
    font-size: 0.9rem;
    font-weight: 500;
}

.play-mode-dropdown .dropdown-desc {
    font-size: 0.7rem;
    color: rgba(255, 255, 255, 0.5);
}

.play-mode-dropdown .dropdown-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 4px 8px;
}

/* ========================================
   PROGRESS BAR (Attached to Card) - DISABLED
   ======================================== */
body:not(.focus-mode):not(.video-mode) .progress-container {
   display: none;
}

/* Desktop-only elements (hide on mobile) */
.mobile-only {
    display: none !important;
}

/* HIDE OLD ELEMENTS */
.shortcuts-info,
.stats-dashboard,
.media-status,
.focus-exit-button,
.video-pause-button
{
    display: none !important;
}

/* ========================================
   TABLET/IPAD ADJUSTMENTS (769px - 1024px)
   Optimized for iPad Mini, iPad Air, iPad Pro
   ======================================== */
@media (min-width: 769px) and (max-width: 1024px) {
    :root {
        --drawer-width: 380px;
        --top-bar-height: 65px;
        --bottom-bar-height: 85px;
    }

    /* Flashcard - Tablet optimized sizing */
    body:not(.focus-mode):not(.video-mode) .flashcard {
        height: clamp(400px, 70dvh, 750px);
        width: clamp(400px, 85vw, 850px);
        max-width: 850px;
    }

    /* Sentences Panel - Tablet optimized */
    .sentences-panel {
        max-height: 75vh;
        width: 90%;
        max-width: 600px;
    }

    /* Top Controls - Slightly tighter spacing */
    .top-controls-right {
        gap: 10px;
    }

    .icon-btn {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    /* Session pill - Tablet size (match button height) */
    .session-pill {
        height: 48px;
        font-size: 0.95rem;
        padding: 0 22px;
    }

    /* Bottom Action Bar - Tablet optimized */
    .bottom-action-bar {
        height: var(--bottom-bar-height);
        max-width: 85%;
        gap: 10px;
        padding: 10px 20px;
    }

    .action-btn {
        width: 48px;
        height: 48px;
        font-size: 1.3rem;
    }

    /* Vocabulary image - Tablet sizing */
    body:not(.focus-mode):not(.video-mode) .vocabulary-image {
        max-width: 480px;
        max-height: 480px;
    }

    /* Card badges - Slightly smaller */
    .card-number {
        padding: 7px 16px;
        font-size: 0.95em;
    }

    .class-badge {
        padding: 7px 16px;
        font-size: 0.85em;
    }

    /* Progress bar wrapper */
    .premium-progress-wrapper {
        max-width: 550px;
    }
}

/* Mobile Tweaks */
/* Mobile Tweaks - IMMERSIVE MODE */
@media (max-width: 768px) {
    :root {
        --drawer-width: 100%;
        --top-bar-height: 50px; /* Condensed top bar */
    }

    /* Show mobile-only elements, hide desktop-only */
    .mobile-only {
        display: flex !important;
    }

    .desktop-only {
        display: none !important;
    }

    /* Mobile Text Scaling Overrides (Fix Long Kana Clipping) */
    .flashcard[data-text-tier="short"] { --text-size-ja: clamp(2.5rem, 12vw, 4em); }
    .flashcard[data-text-tier="medium"] { --text-size-ja: clamp(1.8rem, 8vw, 3em); }
    .flashcard[data-text-tier="long"] { --text-size-ja: clamp(1.2rem, 6vw, 2.2em); }

    /* ========================================
       DYNAMIC TEXT SCALING (Per-Word)
       Uses --ja-chars and --roma-chars from JS
       ======================================== */

    /* Dynamic Japanese scaling: larger chars = smaller font */
    /* Formula: 60vw / char_count (reduced from 72vw to account for container padding) */
    body:not(.focus-mode):not(.video-mode) .japanese-text {
        font-size: clamp(1.2rem, min(calc(60vw / var(--ja-chars, 8)), 10vw), 4rem);
    }

    /* Dynamic Romanization scaling: ensures long romanizations fit */
    /* Uses min() to pick smaller of: base size OR calculated fit size */
    body:not(.focus-mode):not(.video-mode) .romanization,
    body:not(.focus-mode):not(.video-mode) #front-romanization {
        /* Base: 1.2rem, but cap at (80vw / char_count * 1.8) for long words */
        font-size: clamp(0.7rem, min(1.2rem, calc(80vw / var(--roma-chars, 12) * 1.8)), 1.4rem);
        /* Allow wrapping for very long romanizations (2 lines max) */
        white-space: normal;
        text-align: center;
        line-height: 1.4;
        max-width: 95%;
        word-break: keep-all; /* Don't break mid-word */
    }

    /* Hide top-right buttons when vocab panel is open */
    body.vocab-panel-open .top-controls-right {
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.2s ease;
    }

    /* IMMERSIVE HERO CARD LAYOUT - Optimized for iPhone 14 Pro Max (430x932) */
    body:not(.focus-mode):not(.video-mode) .flashcard {
        height: calc(100dvh - 140px); /* Full height minus top bar and action bar */
        width: calc(100vw - 12px);
        max-width: none;
        margin-top: 0px;
    }

    /* Opaque white card face — prevents warm body color bleeding through */
    body:not(.focus-mode):not(.video-mode) .card-face {
        background: #FAFAF7;
    }

    /* ========================================
       HERO MODE: Content expands to fill space,
       shrinks gracefully when romanization appears
       ======================================== */

    /* Card Content - center content, smooth transitions */
    body:not(.focus-mode):not(.video-mode) .card-content {
        justify-content: center;
        padding: clamp(35px, 4dvh, 50px) 15px 12px 15px; /* Reduced top padding - shifts content up */
        gap: 10px;
        align-items: center;
        text-align: center;
    }

    /* HERO STATE: Before romanization - image and text fill space */
    body:not(.focus-mode):not(.video-mode) .card-content:not(.romanization-revealed) .vocabulary-image {
        max-height: none;
        height: 65%; /* Larger image when no romanization */
        min-height: 270px;
        width: auto;
        max-width: 100%;
        margin-bottom: 12px;
        object-fit: contain;
        flex-shrink: 0;
        transition: height 0.4s ease-out, margin 0.3s ease-out;
    }

    /* HERO STATE: Japanese text is bigger when alone */
    body:not(.focus-mode):not(.video-mode) .card-content:not(.romanization-revealed) .japanese-text {
        transform: scale(1.15);
        margin-bottom: 8px;
        transition: transform 0.4s ease-out, margin 0.3s ease-out;
    }

    /* Strip frosted pill from Japanese text on mobile — match bare English text */
    body:not(.focus-mode):not(.video-mode) .japanese-text {
        background: none;
        backdrop-filter: none;
        border: none;
        box-shadow: none;
        padding: 0;
        border-radius: 0;
    }

    /* REVEALED STATE: Image shrinks to make room */
    body:not(.focus-mode):not(.video-mode) .card-content.romanization-revealed .vocabulary-image {
        max-height: none;
        height: 56%; /* Subtle shrink: 65% → 56% = 9% */
        min-height: 240px;
        width: auto;
        max-width: 100%;
        margin-bottom: 12px; /* Tighter spacing */
        object-fit: contain;
        flex-shrink: 0;
        transition: height 0.4s ease-out, margin 0.3s ease-out;
    }

    /* REVEALED STATE: Japanese text normal size */
    body:not(.focus-mode):not(.video-mode) .card-content.romanization-revealed .japanese-text {
        transform: scale(1);
        margin-bottom: 2px;
        transition: transform 0.4s ease-out, margin 0.3s ease-out;
    }

    body:not(.focus-mode):not(.video-mode) #front-romanization {
        /* Override base position:relative which may cause offset */
        position: static;
        /* Don't force display - let JS control visibility */
        /* font-size now handled by dynamic scaling above (uses --roma-chars) */
        opacity: 0.78;
        margin: 0 0 12px 0; /* Bottom margin matches image margin-bottom */
        padding: 6px 16px;
    }

    /* Only show romanization when JS hasn't hidden it AND it has content */
    body:not(.focus-mode):not(.video-mode) #front-romanization:not([style*="display: none"]):not(:empty) {
        display: inline-block !important;
    }

    /* Dynamic English scaling: 2-row layout for better readability */
    /* Formula: 180vw / char_count (accounts for 2 rows) with 6vw cap */
    /* Short text: larger fonts. Long text: wraps to 2 lines gracefully */
    body:not(.focus-mode):not(.video-mode) .english-text {
        font-size: clamp(1.1rem, min(calc(180vw / var(--en-chars, 15)), 6vw), 2rem);
        margin-top: 4px;
        max-width: 95%;
        line-height: 1.35;
        /* 2-row layout: allows long translations to wrap gracefully */
        white-space: normal; /* Override base nowrap to enable wrapping */
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
        text-overflow: ellipsis;
        word-break: break-word;
    }

    /* HIDE CLUTTER - but keep card counter */
    /* .motivation is now a fixed-position toast that doesn't affect layout */
    .logo-watermark,
    .session-pill,
    .premium-progress-wrapper,
    .textbook-indicator,
    .textbook-tooltip {
        display: none !important;
    }

    /* Card counter - small and subtle in top-left */
    body:not(.focus-mode):not(.video-mode) .card-number {
        font-size: 0.75rem;
        padding: 4px 10px;
        opacity: 0.85;
        background: rgba(255,255,255,0.9);
        border-radius: 12px;
        top: 12px; /* Alignment fix */
        left: 12px;
        transition: background 0.3s ease, color 0.3s ease;
    }

    /* Restore Status Colors (Green/Orange) for Mobile */
    body:not(.focus-mode):not(.video-mode) .flashcard.status-known .card-number {
        background: var(--status-mastered-vivid);
        color: white;
        opacity: 1;
        box-shadow: 0 4px 15px rgba(var(--status-mastered-vivid-rgb), 0.24);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }

    body:not(.focus-mode):not(.video-mode) .flashcard.status-learning .card-number {
        background: var(--status-learning-vivid);
        color: white;
        opacity: 1;
        box-shadow: 0 4px 15px rgba(var(--status-learning-vivid-rgb), 0.24);
        border: 1px solid rgba(255, 255, 255, 0.2);
    }

    /* Minimize POS Badge - top right */
    body:not(.focus-mode):not(.video-mode) .class-badge {
        font-size: 0.7rem;
        padding: 3px 10px;
        opacity: 0.9;
        top: 12px;
        right: 12px;
    }

    /* Hide category badge on mobile - too cluttered */
    body:not(.focus-mode):not(.video-mode) .card-category-badge {
        display: none !important;
    }

    body:not(.focus-mode):not(.video-mode) .flashcard-container {
        padding: 5px 8px;
        margin-top: var(--top-bar-height);
    }

    /* Hide focus mode button on mobile - no space for backgrounds */
    .bottom-action-bar .standard-only-btn {
        display: none !important;
    }

    /* IMMERSIVE ACTION BAR */
    .bottom-action-bar {
        position: fixed;
        bottom: calc(15px + env(safe-area-inset-bottom, 0));
        left: 50%;
        transform: translateX(-50%);
        margin: 0;

        height: 60px;
        width: auto;
        min-width: 200px;
        padding: 0 20px;
        gap: 20px;

        /* BATTERY FIX: Reduced blur from 20px to 8px - saves ~15% GPU on mobile */
        background: rgba(20, 20, 25, 0.85); /* Slightly more opaque to compensate */
        backdrop-filter: blur(5px);
        -webkit-backdrop-filter: blur(5px);
        border-radius: 30px;
        box-shadow: 0 10px 30px rgba(44,44,44,0.24);
    }

    /* Hide buttons replaced by gestures */
    /* Keep: Lang toggle, Shuffle (🎲), Audio (🎧), Learned (✓), Learning (✗) */
    /* Hide: Prev/Next (swipes), Exit, Video mode */
    .bottom-action-bar button[onclick="previousCard()"],
    .bottom-action-bar button[onclick="nextCard()"],
    .bottom-action-bar .exit-mode-btn {
        display: none !important;
    }

    /* Show audio button */
    .bottom-action-bar #audioButton {
        display: flex !important;
    }

    .action-btn {
        width: 44px;
        height: 44px;
        font-size: 1.2rem;
    }

    /* Mobile: Hide labels, flatten groups for single row */
    .action-label-strip,
    .group-label {
        display: none !important;
    }

    /* Hide Navigate, Mode, and Mark groups on mobile (gestures handle marking) */
    .navigate-group,
    .standard-only-group,
    .action-group.standard-focus-group:has(.btn-known),
    .split-button-container,
    #videoModeBtn,
    #videoPauseBtn,
    .exit-mode-btn {
        display: none !important;
    }

    /* 3x2 grid with labels */
    .action-groups-container {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
        width: 100%;
    }

    .action-group {
        display: contents;
    }

    .group-buttons {
        display: contents;
    }

    /* Buttons with labels below - RECTANGULAR style */
    .action-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        width: 100%;
        height: auto;
        padding: 8px 6px 4px 6px; /* Tighter padding */
        gap: 2px;
        border-radius: 12px;
    }

    /* DISABLE hover scale on touch devices - causes sticky enlarged state */
    .action-btn:hover {
        transform: none;
    }

    /* Use :active for brief tap feedback instead */
    .action-btn:active {
        transform: scale(0.95);
        opacity: 0.8;
    }

    .action-btn::after {
        content: attr(data-label);
        font-size: 0.55rem;
        text-transform: uppercase;
        letter-spacing: 0.3px;
        opacity: 0.7;
    }

    /* Exit button: icon-only, no text label */
    .btn-exit::after {
        display: none !important;
    }

    /* 2-row action bar - MATCH CARD WIDTH */
    .bottom-action-bar {
        height: auto;
        min-height: 80px; /* Reduced for 2 rows */
        padding: 10px 14px 6px 14px; /* Tighter padding */
        /* Match card width: calc(100vw - 12px) minus some margin */
        width: calc(100vw - 24px);
        max-width: 500px; /* Cap for larger phones */
        border-radius: 16px;
    }

    /* Gesture hints below action bar - 4 gestures */
    .bottom-action-bar::after {
        content: "👈👉 Navigate • 👆 Known • 👇 New • Tap to Flip";
        display: block;
        width: 100%;
        text-align: center;
        font-size: 0.75rem;
        color: rgba(255, 255, 255, 0.5);
        margin-top: -2px;
        letter-spacing: 0.2px;
    }

    /* Move card content UP - clear action bar (80px) + gesture hints (~25px) + breathing room */
    /* Uses viewport-relative padding for consistent spacing across screen sizes */
    body:not(.focus-mode):not(.video-mode) .card-content {
        padding-bottom: clamp(145px, 18dvh, 200px);
    }

    /* Top Bar Minimalist */
    .hero-top-bar {
        padding: 0 15px;
        height: 50px;
    }

    /* Buttons: align vertically in 50px header */
    .top-controls-right {
        margin-top: 4px;
    }

    /* Show header Quiz button on mobile grid mode */
    body.grid-mode .header-quiz-btn.mobile-grid-only {
        display: flex;
    }

    /* Branding - Logo + Text compact pill, aligned with buttons */
    .app-branding-topleft {
        left: 12px;
        top: 4px; /* Match buttons margin-top */
        transform: none;
        height: auto;
        gap: 0;
    }

    /* Mobile: swap hanko stamp for text kanji */
    .branding-logo {
        display: none;
    }

    .branding-kanji {
        display: inline;
        font-size: 16px;
    }

    .branding-name {
        font-size: 11px;
    }

    .app-branding-topleft .branding-title-topleft {
        display: flex;
        align-items: center;
        gap: 5px;
        height: auto;
        background: rgba(255, 255, 255, 0.55);
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
        border: 1px solid rgba(44, 44, 44, 0.06);
        box-shadow: 0 2px 10px rgba(44,44,44,0.04);
        padding: 6px 10px;
        border-radius: 8px;
        color: #2C2C2C;
        -webkit-text-fill-color: #2C2C2C;
    }

    /* Icon buttons - harmonized with brand logo at 44px */
    .icon-btn {
        width: 44px;
        height: 44px;
        font-size: 1.15rem;
    }

    .top-controls-right {
        gap: 8px; /* Tighter spacing for smaller buttons */
    }
}

/* Extra small phones (iPhone SE - 375px and below) */
@media (max-width: 375px) {
    body:not(.focus-mode):not(.video-mode) .flashcard {
        height: clamp(400px, 75dvh, 650px);
    }

    body:not(.focus-mode):not(.video-mode) .vocabulary-image {
        height: 48%;
        min-height: 200px;
    }

    /* padding-bottom inherited from 768px rule: clamp(145px, 18dvh, 200px) */

    body:not(.focus-mode):not(.video-mode) .japanese-text {
        font-size: 2rem;
    }

    /* Smaller text branding on tiny screens */
    .branding-kanji {
        font-size: 14px;
    }

    .branding-name {
        font-size: 10px;
    }

    .app-branding-topleft .branding-title-topleft {
        height: auto;
        padding: 5px 8px;
        border-radius: 7px;
        gap: 4px;
    }

    /* Icon buttons - harmonized with brand logo at 38px */
    .icon-btn {
        width: 38px;
        height: 38px;
        font-size: 1rem;
    }

    .top-controls-right {
        gap: 6px;
    }
}

/* Prevent horizontal swipe back/forward in browser history on mobile */
body:not(.focus-mode):not(.video-mode) .flashcard-container {
    touch-action: pan-y pinch-zoom;
}

/* Hide textbook indicator on mobile - saves space, prevents image overlap */
@media (max-width: 768px) {
    .textbook-indicator,
    .textbook-tooltip {
        display: none !important;
    }

    /* GESTURE HINTS OVERLAY - Hidden (removed onboarding) */
    .gesture-hints-overlay {
        display: none !important;
    }
}