/* 6 THINKING HATS – Classroom Game */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box
}

html,
body {
    overscroll-behavior: none;
    touch-action: manipulation
}

:root {
    --bg-dark: #1c2a1c;
    --glass-bg: rgba(200, 162, 74, .06);
    --glass-border: rgba(200, 162, 74, .12);
    --accent-1: #c8a24a;
    --accent-2: #e6c877;
    --accent-3: #7a4324;
    --text-primary: #e9dfc4;
    --text-secondary: rgba(233, 223, 196, .6);
    --font: 'Outfit', system-ui, sans-serif;

    /* Hat colors */
    --hat-white: #e2e8f0;
    --hat-red: #ef4444;
    --hat-black: #1e293b;
    --hat-yellow: #eab308;
    --hat-green: #22c55e;
    --hat-blue: #3b82f6;
}

body {
    font-family: var(--font);
    background: var(--bg-dark);
    color: var(--text-primary);
    min-height: 100dvh;
    overflow-x: hidden;
    position: relative;
}

#particles {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none
}

/* ---- Screens ---- */
.screen {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transition: opacity .4s, visibility .4s
}

.screen.active {
    opacity: 1;
    visibility: visible
}

/* ---- Setup Screen ---- */
.glass-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 2rem;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    padding: 2.4rem;
    text-align: center;
    max-width: 480px;
    width: 92%;
    box-shadow: 0 8px 32px rgba(0, 0, 0, .35), inset 0 1px 0 rgba(255, 255, 255, .08);
    position: relative;
    overflow: hidden
}

.glass-card::before {
    content: '';
    position: absolute;
    top: -60%;
    left: -30%;
    width: 160%;
    height: 160%;
    background: radial-gradient(circle, rgba(200, 162, 74, .12) 0%, transparent 60%);
    pointer-events: none
}

.logo-area {
    margin-bottom: 1.4rem
}

.logo-icon {
    font-size: 3.2rem;
    display: block;
    margin-bottom: .3rem;
    filter: drop-shadow(0 0 18px rgba(200, 162, 74, .5));
    animation: float 3s ease-in-out infinite
}

h1 {
    font-size: 2rem;
    font-weight: 900;
    letter-spacing: -.5px;
    background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.15
}

.tagline {
    color: var(--text-secondary);
    font-size: .85rem;
    margin-top: .3rem;
    font-weight: 300;
    letter-spacing: .5px
}

.setup-form {
    display: flex;
    flex-direction: column;
    gap: .8rem;
    margin-bottom: 1.2rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: .3rem;
    text-align: left;
}

.form-label {
    font-size: .78rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: .8px;
}

.theme-input {
    width: 100%;
    padding: .7rem .9rem;
    font-family: var(--font);
    font-size: .9rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    outline: none;
    transition: border-color .2s
}

.theme-input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(200, 162, 74, .15)
}

.cefr-select {
    width: 100%;
    padding: .7rem .9rem;
    font-family: var(--font);
    font-size: .9rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, .08);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    outline: none;
    cursor: pointer;
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23888' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    transition: border-color .2s;
}

.cefr-select:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(200, 162, 74, .15)
}

.cefr-select option {
    background: #1c2a1c;
    color: var(--text-primary);
}

/* Timer config in setup */
.timer-config {
    display: flex;
    align-items: center;
    gap: .6rem;
}

.timer-input {
    width: 70px;
    padding: .55rem .7rem;
    font-family: var(--font);
    font-size: .9rem;
    color: var(--text-primary);
    background: rgba(255, 255, 255, .05);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    outline: none;
    text-align: center;
    transition: border-color .2s;
}

.timer-input:focus {
    border-color: var(--accent-1);
}

.timer-unit {
    font-size: .82rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ---- Buttons ---- */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .6rem;
    padding: .85rem 2.2rem;
    font-size: 1.05rem;
    font-weight: 700;
    font-family: var(--font);
    color: #fff;
    border: none;
    border-radius: 100px;
    cursor: pointer;
    background: linear-gradient(135deg, var(--accent-2), var(--accent-1));
    box-shadow: 0 4px 20px rgba(230, 200, 119, .35);
    transition: transform .2s, box-shadow .2s, opacity .2s;
    position: relative;
    overflow: hidden;
}

.btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, transparent 40%, rgba(255, 255, 255, .15) 100%);
    pointer-events: none
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px) scale(1.03)
}

.btn-primary:active:not(:disabled) {
    transform: scale(.97)
}

.btn-primary:disabled {
    opacity: .5;
    cursor: not-allowed;
    transform: none
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    padding: .6rem 1.4rem;
    font-size: .85rem;
    font-weight: 600;
    font-family: var(--font);
    color: var(--text-primary);
    background: rgba(255, 255, 255, .08);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    cursor: pointer;
    transition: background .2s, transform .2s
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, .14);
    transform: translateY(-1px)
}

.btn-icon {
    padding: .5rem .9rem;
    font-size: .85rem;
    font-weight: 600;
    font-family: var(--font);
    color: var(--text-primary);
    background: rgba(255, 255, 255, .08);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
    cursor: pointer;
    transition: background .2s, transform .2s;
    display: inline-flex;
    align-items: center;
    gap: .35rem;
}

.btn-icon:hover {
    background: rgba(255, 255, 255, .14);
    transform: translateY(-1px)
}

.btn-icon {
    white-space: nowrap;
    flex-shrink: 0;
}

.divider {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
    font-size: .75rem;
    text-transform: uppercase;
    letter-spacing: 2px
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--glass-border)
}

/* ---- Loading ---- */
.loading-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(255, 255, 255, .1);
    border-top-color: var(--accent-1);
    border-radius: 50%;
    animation: spin .8s linear infinite;
}

.loading-text {
    font-size: .9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

/* ============================================
   BOARD SCREEN
   ============================================ */

.board-screen {
    position: absolute;
    inset: 0;
    z-index: 1;
    opacity: 0;
    visibility: hidden;
    transition: opacity .4s, visibility .4s;
    display: flex;
    flex-direction: column;
    overflow-y: auto;
}

.board-screen.active {
    opacity: 1;
    visibility: visible;
}

/* ---- Board Header ---- */
.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: .8rem 1.4rem;
    background: rgba(0, 0, 0, .3);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--glass-border);
    flex-shrink: 0;
    gap: 1rem;
    flex-wrap: wrap;
    z-index: 10;
}

.board-topic {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: .4rem;
}

.board-topic-text {
    background: linear-gradient(135deg, var(--accent-1), var(--accent-3));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.board-cefr-badge {
    padding: .2rem .6rem;
    font-size: .7rem;
    font-weight: 700;
    color: var(--accent-1);
    background: rgba(200, 162, 74, .15);
    border: 1px solid rgba(200, 162, 74, .3);
    border-radius: 100px;
    letter-spacing: .5px;
}

.board-controls {
    display: flex;
    align-items: center;
    gap: .75rem;
    flex-wrap: wrap;
}

/* ---- Timer ---- */
.timer-display {
    display: flex;
    align-items: center;
    gap: .6rem;
    padding: .4rem .8rem;
    background: rgba(255, 255, 255, .06);
    border: 1px solid var(--glass-border);
    border-radius: 100px;
}

.timer-time {
    font-size: 1.4rem;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    min-width: 5ch;
    text-align: center;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.timer-time.timer-warning {
    color: var(--hat-yellow);
    animation: timer-pulse 1s ease-in-out infinite;
}

.timer-time.timer-critical {
    color: var(--hat-red);
    animation: timer-pulse .5s ease-in-out infinite;
}

@keyframes timer-pulse {
    0%, 100% { opacity: 1 }
    50% { opacity: .5 }
}

.timer-btn {
    width: 32px;
    height: 32px;
    border: none;
    background: rgba(255, 255, 255, .1);
    color: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    font-size: .9rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s;
}

.timer-btn:hover {
    background: rgba(255, 255, 255, .2);
}

/* ---- Hat Cards Grid ---- */
.hats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1rem 1.2rem;
    flex: 1;
    align-content: center;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* ---- Hat Card (3D Flip) ---- */
.hat-card {
    perspective: 1200px;
    cursor: pointer;
    min-height: 280px;
}

.hat-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 280px;
    transition: transform .7s cubic-bezier(.4, 0, .2, 1);
    transform-style: preserve-3d;
}

.hat-card.revealed .hat-card-inner {
    transform: rotateY(180deg);
}

.hat-card-front,
.hat-card-back {
    position: absolute;
    inset: 0;
    backface-visibility: hidden;
    border-radius: 1.4rem;
    overflow: hidden;
}

/* Card Front (hidden state) */
.hat-card-front {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: .6rem;
}

.hat-card-front-icon {
    font-size: 3rem;
    filter: grayscale(1) opacity(.4);
    transition: filter .3s;
}

.hat-card:hover .hat-card-front-icon {
    filter: grayscale(0) opacity(.8);
}

.hat-card-front-label {
    font-size: .9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.hat-card-front-hint {
    font-size: .7rem;
    color: rgba(255, 255, 255, .3);
    font-weight: 400;
}

/* Card Back (revealed) */
.hat-card-back {
    transform: rotateY(180deg);
    background: var(--glass-bg);
    border: 2px solid var(--glass-border);
    backdrop-filter: blur(16px);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, .15) transparent;
}

.hat-card-back::-webkit-scrollbar {
    width: 4px;
}

.hat-card-back::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, .15);
    border-radius: 4px;
}

/* Card header with hat color */
.hat-header {
    padding: .8rem 1rem;
    display: flex;
    align-items: center;
    gap: .6rem;
    flex-shrink: 0;
}

.hat-emoji {
    font-size: 1.6rem;
}

.hat-title-area {
    flex: 1;
}

.hat-name {
    font-size: 1rem;
    font-weight: 800;
    line-height: 1.2;
}

.hat-mode {
    font-size: .72rem;
    font-weight: 500;
    opacity: .7;
}

/* Hat color-specific borders and headers */
.hat-card[data-hat="white"] .hat-card-back { border-color: var(--hat-white) }
.hat-card[data-hat="white"] .hat-header { background: rgba(226, 232, 240, .12) }
.hat-card[data-hat="white"] .hat-name { color: var(--hat-white) }

.hat-card[data-hat="red"] .hat-card-back { border-color: var(--hat-red) }
.hat-card[data-hat="red"] .hat-header { background: rgba(239, 68, 68, .12) }
.hat-card[data-hat="red"] .hat-name { color: var(--hat-red) }

.hat-card[data-hat="black"] .hat-card-back { border-color: rgba(100, 116, 139, .6) }
.hat-card[data-hat="black"] .hat-header { background: rgba(30, 41, 59, .4) }
.hat-card[data-hat="black"] .hat-name { color: #94a3b8 }

.hat-card[data-hat="yellow"] .hat-card-back { border-color: var(--hat-yellow) }
.hat-card[data-hat="yellow"] .hat-header { background: rgba(234, 179, 8, .12) }
.hat-card[data-hat="yellow"] .hat-name { color: var(--hat-yellow) }

.hat-card[data-hat="green"] .hat-card-back { border-color: var(--hat-green) }
.hat-card[data-hat="green"] .hat-header { background: rgba(34, 197, 94, .12) }
.hat-card[data-hat="green"] .hat-name { color: var(--hat-green) }

.hat-card[data-hat="blue"] .hat-card-back { border-color: var(--hat-blue) }
.hat-card[data-hat="blue"] .hat-header { background: rgba(59, 130, 246, .12) }
.hat-card[data-hat="blue"] .hat-name { color: var(--hat-blue) }

/* Card body content */
.hat-body {
    padding: .6rem 1rem 1rem;
    flex: 1;
}

.hat-role {
    font-size: .78rem;
    color: var(--text-secondary);
    margin-bottom: .7rem;
    font-style: italic;
    line-height: 1.4;
}

.hat-section-title {
    font-size: .68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-secondary);
    margin-bottom: .35rem;
    margin-top: .6rem;
}

.hat-questions {
    list-style: none;
    padding: 0;
}

.hat-questions li {
    font-size: .82rem;
    line-height: 1.45;
    color: var(--text-primary);
    padding: .25rem 0;
    padding-left: 1rem;
    position: relative;
}

.hat-questions li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--text-secondary);
    font-size: .7rem;
}

.hat-starters {
    list-style: none;
    padding: 0;
    display: flex;
    flex-wrap: wrap;
    gap: .3rem;
}

.hat-starters li {
    font-size: .72rem;
    padding: .25rem .6rem;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .08);
    border-radius: 100px;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ---- Animations ---- */
@keyframes float {
    0%, 100% { transform: translateY(0) }
    50% { transform: translateY(-8px) }
}

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

.hat-card {
    animation: fadeInUp .5s ease-out both;
}

.hat-card:nth-child(1) { animation-delay: .05s }
.hat-card:nth-child(2) { animation-delay: .1s }
.hat-card:nth-child(3) { animation-delay: .15s }
.hat-card:nth-child(4) { animation-delay: .2s }
.hat-card:nth-child(5) { animation-delay: .25s }
.hat-card:nth-child(6) { animation-delay: .3s }

/* ---- Responsive ---- */
@media (max-width: 1024px) {
    .hats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: .8rem;
        padding: .8rem;
    }

    .hat-card, .hat-card-inner {
        min-height: 260px;
    }
}

@media (max-width: 700px) {
    .glass-card {
        padding: 1.8rem 1.3rem;
        max-width: 96vw;
        width: 96%
    }

    .board-header {
        flex-direction: column;
        align-items: stretch;
        gap: .5rem;
        padding: .6rem .8rem;
    }

    .board-controls {
        justify-content: center;
    }

    .hats-grid {
        grid-template-columns: 1fr;
        gap: .7rem;
        padding: .6rem;
    }

    .hat-card, .hat-card-inner {
        min-height: 220px;
    }

    h1 {
        font-size: 1.7rem
    }

    .timer-time {
        font-size: 1.2rem;
    }
}

@media (max-width: 400px) {
    .hat-card, .hat-card-inner {
        min-height: 200px;
    }

    h1 {
        font-size: 1.4rem
    }
}