/* =============================================
   LexiLoops - Word Puzzle Generator
   Visual Style: Letter Block Aesthetic
   Colors: Cream, Ink Black, Teal, Orange
   ============================================= */

:root {
    /* Core Colors */
    --cream: #FAF8F5;
    --cream-dark: #F0EDE8;
    --ink: #1A1A1A;
    --ink-light: #3D3D3D;
    --ink-muted: #6B6B6B;

    /* Accent Colors */
    --teal: #2A9D8F;
    --teal-light: #40B4A6;
    --teal-dark: #1E7A6E;
    --teal-ghost: rgba(42, 157, 143, 0.1);

    --orange: #E76F51;
    --orange-light: #F4845F;
    --orange-dark: #D55A3D;
    --orange-ghost: rgba(231, 111, 81, 0.1);

    /* Tile Colors */
    --tile-bg: #FFFFFF;
    --tile-border: #E8E4DE;
    --tile-shadow: rgba(26, 26, 26, 0.08);
    --tile-highlight: rgba(255, 255, 255, 0.8);

    /* Typography */
    --font-display: 'Fraunces', serif;
    --font-body: 'Crimson Pro', serif;
    --font-mono: 'DM Mono', monospace;

    /* Spacing */
    --space-xs: 4px;
    --space-sm: 8px;
    --space-md: 16px;
    --space-lg: 24px;
    --space-xl: 32px;
    --space-2xl: 48px;
    --space-3xl: 64px;

    /* Borders & Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px var(--tile-shadow);
    --shadow-md: 0 4px 6px var(--tile-shadow), 0 1px 3px var(--tile-shadow);
    --shadow-lg: 0 10px 20px var(--tile-shadow), 0 3px 6px var(--tile-shadow);
    --shadow-tile: 0 3px 0 var(--tile-border), 0 4px 8px var(--tile-shadow);
    --shadow-tile-hover: 0 5px 0 var(--tile-border), 0 8px 16px var(--tile-shadow);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    --transition-bounce: 500ms cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    background-color: var(--cream);
    color: var(--ink);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    position: relative;
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--space-lg);
    min-height: 100vh;
}

/* Background Pattern */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 80%, var(--teal-ghost) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, var(--orange-ghost) 0%, transparent 50%),
        url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231A1A1A' fill-opacity='0.02'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
    z-index: -1;
}

/* Floating Letters */
.floating-letters {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.float-letter {
    position: absolute;
    left: var(--x);
    top: var(--y);
    font-family: var(--font-display);
    font-size: 8rem;
    font-weight: 800;
    color: var(--ink);
    opacity: 0.03;
    animation: float 20s ease-in-out infinite;
    animation-delay: var(--delay);
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -30px) rotate(5deg); }
    50% { transform: translate(-10px, 20px) rotate(-3deg); }
    75% { transform: translate(30px, 10px) rotate(3deg); }
}

/* =============================================
   Header
   ============================================= */
.main-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-xl);
    border-bottom: 1px solid var(--tile-border);
    margin-bottom: var(--space-xl);
}

.logo-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
}

.logo-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--tile-bg);
    border: 2px solid var(--ink);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 800;
    box-shadow: var(--shadow-tile);
    transition: transform var(--transition-bounce), box-shadow var(--transition-base);
}

.logo-letter:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-tile-hover);
}

.logo-letter:nth-child(1) { animation: logoWave 3s ease-in-out infinite; animation-delay: 0s; }
.logo-letter:nth-child(2) { animation: logoWave 3s ease-in-out infinite; animation-delay: 0.1s; }
.logo-letter:nth-child(3) { animation: logoWave 3s ease-in-out infinite; animation-delay: 0.2s; }
.logo-letter:nth-child(4) { animation: logoWave 3s ease-in-out infinite; animation-delay: 0.3s; }

@keyframes logoWave {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-4px); }
}

.logo-loop {
    font-family: var(--font-display);
    font-size: 2rem;
    color: var(--teal);
    margin-left: var(--space-sm);
    animation: spin 8s linear infinite;
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.tagline {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--ink-muted);
    font-style: italic;
    letter-spacing: 0.5px;
}

/* Navigation */
.main-nav {
    display: flex;
    gap: var(--space-sm);
}

.nav-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: 2px solid transparent;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--ink-muted);
    cursor: pointer;
    transition: all var(--transition-base);
}

.nav-btn:hover {
    color: var(--ink);
    background: var(--cream-dark);
}

.nav-btn.active {
    color: var(--ink);
    background: var(--tile-bg);
    border-color: var(--tile-border);
    box-shadow: var(--shadow-sm);
}

.nav-icon {
    font-size: 1.1rem;
}

/* =============================================
   Section Headers
   ============================================= */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-xl);
}

.section-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--ink);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--teal);
    border-radius: 2px;
}

.date-badge {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 2px;
}

.date-day {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--teal);
}

.date-full {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--ink-muted);
}

/* =============================================
   Difficulty Selector
   ============================================= */
.difficulty-selector {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
    margin-bottom: var(--space-lg);
}

.difficulty-label {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-muted);
}

.difficulty-options {
    display: flex;
    gap: var(--space-sm);
}

.difficulty-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--ink-muted);
    cursor: pointer;
    transition: all var(--transition-base);
}

.difficulty-btn:hover {
    border-color: var(--ink-muted);
    color: var(--ink);
}

.difficulty-btn.active {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--cream);
}

.difficulty-btn.active[data-difficulty="easy"] {
    background: var(--teal);
    border-color: var(--teal);
}

.difficulty-btn.active[data-difficulty="medium"] {
    background: var(--orange);
    border-color: var(--orange);
}

.difficulty-btn.active[data-difficulty="hard"] {
    background: var(--ink);
    border-color: var(--ink);
}

.diff-icon {
    font-size: 0.9rem;
}

/* =============================================
   Puzzle Tabs
   ============================================= */
.puzzle-tabs {
    display: flex;
    gap: var(--space-xs);
    padding: var(--space-xs);
    background: var(--cream-dark);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-xl);
}

.puzzle-tab {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md);
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-muted);
    cursor: pointer;
    transition: all var(--transition-base);
}

.puzzle-tab:hover {
    color: var(--ink);
    background: rgba(255, 255, 255, 0.5);
}

.puzzle-tab.active {
    background: var(--tile-bg);
    color: var(--ink);
    box-shadow: var(--shadow-md);
}

.tab-icon {
    font-size: 1.1rem;
}

/* =============================================
   Puzzle Container
   ============================================= */
.puzzle-container {
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    box-shadow: var(--shadow-lg);
    margin-bottom: var(--space-xl);
}

.puzzle-area {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xl);
    animation: fadeIn 0.4s ease;
}

.puzzle-area.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.puzzle-instruction {
    text-align: center;
}

.puzzle-instruction p {
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--ink-muted);
    font-style: italic;
}

/* =============================================
   Letter Tiles (Scramble)
   ============================================= */
.letter-tiles {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-md);
    padding: var(--space-lg);
}

.letter-tile {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--tile-bg) 0%, var(--cream-dark) 100%);
    border: 2px solid var(--ink);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--ink);
    cursor: pointer;
    box-shadow: var(--shadow-tile);
    transition: all var(--transition-bounce);
    user-select: none;
    position: relative;
    overflow: hidden;
}

.letter-tile::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 2px;
    right: 2px;
    height: 30%;
    background: linear-gradient(to bottom, var(--tile-highlight), transparent);
    border-radius: var(--radius-sm) var(--radius-sm) 50% 50%;
    pointer-events: none;
}

.letter-tile:hover {
    transform: translateY(-4px) rotate(-2deg);
    box-shadow: var(--shadow-tile-hover);
}

.letter-tile.selected {
    transform: translateY(-6px) scale(1.05);
    background: var(--teal);
    border-color: var(--teal-dark);
    color: var(--cream);
    box-shadow: 0 6px 0 var(--teal-dark), 0 10px 20px rgba(42, 157, 143, 0.3);
}

.letter-tile.used {
    opacity: 0.3;
    pointer-events: none;
    transform: scale(0.9);
}

.letter-tile.shake {
    animation: tileShake 0.5s ease;
}

@keyframes tileShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-8px) rotate(-3deg); }
    40% { transform: translateX(8px) rotate(3deg); }
    60% { transform: translateX(-6px) rotate(-2deg); }
    80% { transform: translateX(6px) rotate(2deg); }
}

.letter-tile.correct {
    background: var(--teal);
    border-color: var(--teal-dark);
    color: var(--cream);
    animation: tileCorrect 0.6s ease;
}

@keyframes tileCorrect {
    0% { transform: scale(1); }
    50% { transform: scale(1.2) rotate(10deg); }
    100% { transform: scale(1); }
}

/* Answer Slots */
.answer-slots {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    min-height: 80px;
    padding: var(--space-lg);
    background: var(--cream-dark);
    border-radius: var(--radius-lg);
    border: 2px dashed var(--tile-border);
}

.answer-slot {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ink);
    transition: all var(--transition-base);
}

.answer-slot.filled {
    border-color: var(--teal);
    background: var(--teal-ghost);
    animation: slotFill 0.3s ease;
}

@keyframes slotFill {
    0% { transform: scale(0.8); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); }
}

.answer-slot.correct {
    background: var(--teal);
    border-color: var(--teal-dark);
    color: var(--cream);
}

.answer-slot.wrong {
    background: var(--orange-ghost);
    border-color: var(--orange);
    animation: slotWrong 0.5s ease;
}

@keyframes slotWrong {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

/* Puzzle Hint */
.puzzle-hint {
    display: none;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--orange-ghost);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--orange);
    animation: hintReveal 0.4s ease;
}

.puzzle-hint.visible {
    display: flex;
}

@keyframes hintReveal {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

.hint-icon {
    font-size: 1.25rem;
}

.hint-text {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--ink);
    font-style: italic;
}

/* =============================================
   Anagram Puzzle
   ============================================= */
.anagram-source {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
}

.anagram-source .letter-tile {
    width: 52px;
    height: 52px;
    font-size: 1.5rem;
}

.anagram-input-area {
    display: flex;
    gap: var(--space-md);
    width: 100%;
    max-width: 400px;
}

.anagram-input {
    flex: 1;
    padding: var(--space-md) var(--space-lg);
    background: var(--cream-dark);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--ink);
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all var(--transition-base);
}

.anagram-input:focus {
    outline: none;
    border-color: var(--teal);
    background: var(--tile-bg);
}

.anagram-input::placeholder {
    color: var(--ink-muted);
    text-transform: none;
    letter-spacing: normal;
}

.submit-word-btn {
    padding: var(--space-md) var(--space-lg);
    background: var(--teal);
    border: 2px solid var(--teal-dark);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--cream);
    cursor: pointer;
    box-shadow: 0 3px 0 var(--teal-dark);
    transition: all var(--transition-base);
}

.submit-word-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 var(--teal-dark);
}

.submit-word-btn:active {
    transform: translateY(1px);
    box-shadow: 0 1px 0 var(--teal-dark);
}

/* Found Words */
.found-words {
    width: 100%;
    max-width: 500px;
    background: var(--cream-dark);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.found-words-header {
    display: flex;
    justify-content: space-between;
    padding: var(--space-md) var(--space-lg);
    background: var(--tile-bg);
    border-bottom: 1px solid var(--tile-border);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.found-count {
    color: var(--teal);
    font-weight: 500;
}

.found-words-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-lg);
    min-height: 80px;
}

.found-word {
    padding: var(--space-xs) var(--space-md);
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--ink);
    animation: wordPop 0.3s ease;
}

@keyframes wordPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.1); }
    100% { transform: scale(1); opacity: 1; }
}

/* =============================================
   Fill in the Blank Puzzle
   ============================================= */
.fillblank-word {
    display: flex;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-xl);
}

.fillblank-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 64px;
    background: var(--tile-bg);
    border: 2px solid var(--ink);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--ink);
    box-shadow: var(--shadow-tile);
}

.fillblank-letter.blank {
    background: var(--cream-dark);
    border-style: dashed;
    border-color: var(--teal);
    color: var(--teal);
    cursor: pointer;
    transition: all var(--transition-base);
}

.fillblank-letter.blank:hover {
    background: var(--teal-ghost);
}

.fillblank-letter.blank.active {
    background: var(--teal);
    border-style: solid;
    color: var(--cream);
    animation: blankPulse 1s ease infinite;
}

@keyframes blankPulse {
    0%, 100% { box-shadow: var(--shadow-tile), 0 0 0 0 rgba(42, 157, 143, 0.4); }
    50% { box-shadow: var(--shadow-tile), 0 0 0 8px rgba(42, 157, 143, 0); }
}

.fillblank-letter.filled {
    background: var(--teal-ghost);
    border-color: var(--teal);
    color: var(--teal-dark);
}

.fillblank-clue {
    text-align: center;
    padding: var(--space-lg);
    font-family: var(--font-body);
    font-size: 1.1rem;
    color: var(--ink-muted);
    font-style: italic;
    max-width: 400px;
}

.fillblank-clue::before {
    content: '"';
}

.fillblank-clue::after {
    content: '"';
}

/* Letter Keyboard */
.letter-keyboard {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    max-width: 520px;
    padding: var(--space-lg);
    background: var(--cream-dark);
    border-radius: var(--radius-lg);
}

.key-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--ink);
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-fast);
}

.key-btn:hover {
    transform: translateY(-2px);
    border-color: var(--ink-muted);
    box-shadow: var(--shadow-md);
}

.key-btn:active {
    transform: translateY(1px);
    box-shadow: none;
}

.key-btn.used {
    opacity: 0.4;
    pointer-events: none;
}

/* =============================================
   Puzzle Actions
   ============================================= */
.puzzle-actions {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--tile-border);
    margin-top: var(--space-xl);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-lg);
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink);
    cursor: pointer;
    transition: all var(--transition-base);
}

.action-btn:hover {
    border-color: var(--ink-muted);
    transform: translateY(-2px);
}

.action-btn .btn-icon {
    font-size: 1.1rem;
}

.action-btn.hint-btn:hover {
    background: var(--orange-ghost);
    border-color: var(--orange);
    color: var(--orange-dark);
}

.action-btn.check-btn {
    background: var(--teal);
    border-color: var(--teal-dark);
    color: var(--cream);
    box-shadow: 0 3px 0 var(--teal-dark);
}

.action-btn.check-btn:hover {
    background: var(--teal-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 0 var(--teal-dark);
}

.action-btn.reveal-btn:hover {
    background: var(--ink);
    border-color: var(--ink);
    color: var(--cream);
}

.action-btn.next-btn {
    background: var(--orange);
    border-color: var(--orange-dark);
    color: var(--cream);
    box-shadow: 0 3px 0 var(--orange-dark);
}

.action-btn.next-btn:hover {
    background: var(--orange-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 0 var(--orange-dark);
}

.hint-count {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    opacity: 0.7;
}

/* =============================================
   Stats Bar
   ============================================= */
.stats-bar {
    display: flex;
    justify-content: center;
    gap: var(--space-2xl);
    padding: var(--space-lg);
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--ink);
    line-height: 1;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* =============================================
   Views Management
   ============================================= */
.view {
    display: none;
    animation: viewFade 0.4s ease;
}

.view.active {
    display: block;
}

@keyframes viewFade {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* =============================================
   Custom Puzzle Creator
   ============================================= */
.custom-creator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.creator-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.form-label {
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    color: var(--ink);
}

.word-input {
    padding: var(--space-lg);
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--ink);
    resize: vertical;
    min-height: 150px;
    transition: all var(--transition-base);
}

.word-input:focus {
    outline: none;
    border-color: var(--teal);
}

.word-input::placeholder {
    color: var(--ink-muted);
}

/* Type Selector */
.type-selector {
    display: flex;
    gap: var(--space-md);
}

.type-option {
    flex: 1;
    cursor: pointer;
}

.type-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.type-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--tile-bg);
    border: 2px solid var(--tile-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.type-option input:checked + .type-card {
    border-color: var(--teal);
    background: var(--teal-ghost);
}

.type-option:hover .type-card {
    border-color: var(--ink-muted);
}

.type-icon {
    font-size: 1.5rem;
}

.type-name {
    font-family: var(--font-body);
    font-size: 0.9rem;
    color: var(--ink);
}

/* Generate Button */
.generate-btn {
    position: relative;
    padding: var(--space-md) var(--space-xl);
    background: linear-gradient(135deg, var(--teal) 0%, var(--teal-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--cream);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-base);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(42, 157, 143, 0.3);
}

.btn-shine {
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    transition: left 0.5s ease;
}

.generate-btn:hover .btn-shine {
    left: 100%;
}

/* Custom Puzzle Area */
.custom-puzzle-area {
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 400px;
}

.empty-state {
    text-align: center;
    color: var(--ink-muted);
}

.empty-icon {
    font-size: 4rem;
    opacity: 0.3;
    margin-bottom: var(--space-md);
}

.empty-state p {
    font-family: var(--font-body);
    font-style: italic;
}

/* =============================================
   Progress Dashboard
   ============================================= */
.progress-dashboard {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
}

.progress-card {
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
}

.progress-card.achievements-card {
    grid-column: span 2;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-lg);
    padding-bottom: var(--space-md);
    border-bottom: 1px solid var(--tile-border);
}

.card-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--ink);
}

.streak-badge {
    padding: var(--space-xs) var(--space-md);
    background: var(--orange);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--cream);
}

/* Streak Calendar */
.streak-calendar {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: var(--space-xs);
    margin-bottom: var(--space-md);
}

.calendar-day {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--cream-dark);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    transition: all var(--transition-base);
}

.calendar-day.completed {
    background: var(--teal);
    color: var(--cream);
}

.calendar-day.today {
    border: 2px solid var(--orange);
}

.streak-message {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--ink-muted);
    font-style: italic;
    text-align: center;
}

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-md);
}

.stat-box {
    text-align: center;
    padding: var(--space-lg);
    background: var(--cream-dark);
    border-radius: var(--radius-md);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--teal);
    line-height: 1.2;
}

.stat-desc {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Achievements Grid */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

.achievement {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--cream-dark);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
    opacity: 0.5;
    filter: grayscale(100%);
}

.achievement.unlocked {
    opacity: 1;
    filter: none;
    background: linear-gradient(135deg, var(--tile-bg) 0%, var(--teal-ghost) 100%);
    border: 1px solid var(--teal);
}

.achievement-icon {
    font-size: 2rem;
}

.achievement-name {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--ink);
}

.achievement-desc {
    font-family: var(--font-body);
    font-size: 0.75rem;
    color: var(--ink-muted);
}

/* =============================================
   Modal
   ============================================= */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal.active {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.6);
    backdrop-filter: blur(4px);
    animation: backdropFade 0.3s ease;
}

@keyframes backdropFade {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    position: relative;
    background: var(--tile-bg);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: modalPop 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
    max-width: 400px;
    width: 90%;
}

@keyframes modalPop {
    from { opacity: 0; transform: scale(0.8); }
    to { opacity: 1; transform: scale(1); }
}

.result-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-lg);
    background: var(--teal);
    border-radius: 50%;
    font-size: 2.5rem;
    color: var(--cream);
    animation: iconBounce 0.6s ease;
}

@keyframes iconBounce {
    0% { transform: scale(0); }
    50% { transform: scale(1.2); }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

.result-icon.wrong {
    background: var(--orange);
}

.result-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: var(--space-sm);
}

.result-message {
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--ink-muted);
    margin-bottom: var(--space-xl);
}

.result-stats {
    display: flex;
    justify-content: center;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--cream-dark);
    border-radius: var(--radius-md);
}

.result-stat {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
}

.rs-value {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--teal);
}

.rs-label {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ink-muted);
    text-transform: uppercase;
}

.modal-btn {
    padding: var(--space-md) var(--space-2xl);
    background: var(--ink);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--cream);
    cursor: pointer;
    transition: all var(--transition-base);
}

.modal-btn:hover {
    background: var(--ink-light);
    transform: translateY(-2px);
}

/* =============================================
   Toast Notifications
   ============================================= */
.toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    z-index: 1001;
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--tile-bg);
    border: 1px solid var(--tile-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    animation: toastSlide 0.4s ease, toastFade 0.4s ease 2.6s forwards;
}

@keyframes toastSlide {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes toastFade {
    to { transform: translateX(100%); opacity: 0; }
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-content {
    display: flex;
    flex-direction: column;
}

.toast-title {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--ink);
}

.toast-message {
    font-family: var(--font-body);
    font-size: 0.85rem;
    color: var(--ink-muted);
}

/* =============================================
   Responsive Design
   ============================================= */
@media (max-width: 900px) {
    .custom-creator {
        grid-template-columns: 1fr;
    }

    .progress-dashboard {
        grid-template-columns: 1fr;
    }

    .progress-card.achievements-card {
        grid-column: span 1;
    }

    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: var(--space-md);
    }

    .main-header {
        flex-direction: column;
        gap: var(--space-lg);
        text-align: center;
    }

    .main-nav {
        width: 100%;
        justify-content: center;
    }

    .nav-btn span:not(.nav-icon) {
        display: none;
    }

    .section-header {
        flex-direction: column;
        gap: var(--space-md);
        text-align: center;
    }

    .section-title::after {
        left: 50%;
        transform: translateX(-50%);
    }

    .difficulty-selector {
        flex-direction: column;
        gap: var(--space-md);
    }

    .puzzle-tabs {
        flex-direction: column;
    }

    .puzzle-container {
        padding: var(--space-lg);
    }

    .letter-tile {
        width: 52px;
        height: 52px;
        font-size: 1.5rem;
    }

    .answer-slot {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .puzzle-actions {
        flex-wrap: wrap;
    }

    .action-btn {
        flex: 1;
        min-width: 140px;
        justify-content: center;
    }

    .stats-bar {
        gap: var(--space-lg);
    }

    .stat-value {
        font-size: 1.5rem;
    }

    .type-selector {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .logo-letter {
        width: 36px;
        height: 36px;
        font-size: 1.25rem;
    }

    .letter-tile {
        width: 44px;
        height: 44px;
        font-size: 1.25rem;
    }

    .answer-slot {
        width: 38px;
        height: 38px;
        font-size: 1.1rem;
    }

    .fillblank-letter {
        width: 44px;
        height: 52px;
        font-size: 1.5rem;
    }

    .key-btn {
        width: 36px;
        height: 36px;
        font-size: 1rem;
    }

    .achievements-grid {
        grid-template-columns: 1fr 1fr;
    }
}