/* ==================== */
/* CSS CUSTOM PROPERTIES */
/* ==================== */
:root {
    /* Colors */
    --color-bg: #000000;
    --color-text: #ffffff;
    --color-text-muted: rgba(255, 255, 255, 0.5);
    --color-primary: #d5bff2;
    --color-secondary: #bb87ff;
    --color-accent: #FFDD2D;

    /* Typography */
    --font-primary: "Montserrat", sans-serif;
    --font-system: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --padding-mobile: 24px;
    --padding-desktop-v: 30px;
    --padding-desktop-h: 40px;
    --padding-desktop-lg-h: 50px;
    --gap-grid: 2px;

    /* Sizes */
    --radius-card: 12px;
    --radius-card-desktop: 14px;
    --radius-btn: 16px;
    --btn-height: 56px;
    --sound-btn-size: 44px;
    --sound-btn-desktop-size: 44px;
}

/* ==================== */
/* RESET & BASE         */
/* ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    background: var(--color-bg);
    font-family: var(--font-system);
    color: var(--color-text);
    overflow: hidden;
}

/* ==================== */
/* MAIN SCREEN          */
/* ==================== */
.main-screen {
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 16px;
    padding-bottom: 32px;
    background: var(--color-bg);
    overflow: hidden;
}

.main-title-area {
    flex: 1;
    position: relative;
    min-height: 0;
    margin: 0;
}

.main-title {
    position: absolute;
}

.main-title svg {
    width: 100%;
    height: 100%;
    display: block;
}

.main-title path {
    fill: var(--color-primary);
    transition: fill 0.3s ease;
}

/* Mode Cards */
.mode-cards {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.mode-card {
    min-height: 152px;
    cursor: pointer;
    border-radius: 20px;
    transition: transform 0.15s ease, background 0.15s ease;
}

.mode-card:active {
    transform: scale(0.95);
    background: var(--color-accent) !important;
}

.mode-card:active .mode-card-name {
    color: var(--color-bg) !important;
}

.mode-card:active .mode-card-desc {
    color: var(--color-bg) !important;
    opacity: 0.5 !important;
}

/* Classic mode card */
.mode-classic {
    background: var(--color-primary);
    padding: 16px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
}

.mode-card-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mode-classic .mode-card-name {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-bg);
}

.mode-classic .mode-card-desc {
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 400;
    line-height: 1.4;
    color: var(--color-bg);
    opacity: 0.5;
}

.mode-classic .mode-card-emoji {
    font-size: 80px;
    line-height: 1;
    position: absolute;
    right: 16px;
    bottom: 16px;
    transform: scaleX(-1);
}

.mode-card-emoji-img {
    position: absolute;
    right: 16px;
    bottom: 8px;
    width: 100px;
    height: auto;
    transform: scaleX(-1);
}

/* Cards row */
.mode-cards-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
}

/* Small mode cards */
.mode-timed,
.mode-limited {
    padding: 16px;
    padding-right: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.mode-timed {
    background: var(--color-text);
}

.mode-limited {
    background: var(--color-text);
}

.mode-timed .mode-card-emoji,
.mode-limited .mode-card-emoji {
    font-size: 28px;
    line-height: 1;
}

.mode-timed .mode-card-name {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-bg);
}

.mode-limited .mode-card-name {
    font-family: var(--font-primary);
    font-size: 18px;
    font-weight: 500;
    line-height: 1.2;
    color: var(--color-bg);
}

.mode-timed .mode-card-desc {
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 400;
    line-height: 1.4;
    color: var(--color-bg);
    opacity: 0.5;
}

.mode-limited .mode-card-desc {
    font-family: var(--font-primary);
    font-size: 14px;
    font-weight: 400;
    line-height: 1.4;
    color: var(--color-bg);
    opacity: 0.5;
}

.main-credit {
    font-family: var(--font-primary);
    font-size: 12px;
    font-weight: 400;
    line-height: 100%;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 24px;
    flex-shrink: 0;
}

/* ==================== */
/* GAME SCREEN          */
/* ==================== */

/* Main container */
.game-wrapper {
    height: 100vh;
    height: 100dvh;
    display: flex;
    flex-direction: column;
    padding: 16px;
    padding-bottom: 32px;
    position: relative;
    overflow: hidden;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    flex-shrink: 0;
    margin-bottom: 20px;
    position: relative;
}

.header .logo {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
}

/* Test button (temporary) */
.test-btn {
    padding: 8px 12px;
    background: var(--color-accent);
    color: #000;
    border: none;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
}

/* Back button */
.back-btn {
    width: var(--sound-btn-size);
    height: var(--sound-btn-size);
    border: 1px solid var(--color-text);
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s;
    flex-shrink: 0;
}

.back-btn svg {
    width: 10px;
    height: 16px;
}

/* Logo */
.logo {
    height: 36px;
    cursor: pointer;
}

.logo svg {
    height: 100%;
    width: auto;
    display: block;
}

.logo svg path {
    fill: var(--color-primary);
}

/* Sound button */
.sound-btn {
    width: var(--sound-btn-size);
    height: var(--sound-btn-size);
    border: 1px solid var(--color-text);
    border-radius: 10px;
    background: transparent;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.2s;
}

.sound-btn svg {
    width: 20px;
    height: 20px;
    fill: var(--color-text);
}

/* Timer wrapper */
.timer-wrapper {
    margin-top: auto;
    flex-shrink: 0;
}

/* Timer */
.timer {
    font-family: var(--font-primary);
    font-size: 50px;
    font-weight: 400;
    color: var(--color-text);
    line-height: 50px;
}

.timer .ms {
    font-family: var(--font-primary);
    font-size: 22px;
    font-weight: 400;
    line-height: 50px;
}

/* Game board container */
.game-container {
    flex: 0 1 calc((100vw - 52px) * 4 / 3 + 6px);
    margin-top: 40px;
    min-height: 0;
}

/* Game board - 3x4 grid */
.game-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(4, 1fr);
    gap: var(--gap-grid);
    width: 100%;
    height: 100%;
}

/* Card styles */
.card {
    cursor: pointer;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.25s ease;
    min-height: 0;
}

.card.flipped {
    transform: rotateY(180deg);
}

.card.matched {
    animation: matchPulse 0.25s ease;
}

@keyframes matchPulse {
    0%, 100% { transform: rotateY(180deg) scale(1); }
    50% { transform: rotateY(180deg) scale(1.02); }
}

.card-face {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    border-radius: var(--radius-card);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-back {
    background: var(--color-primary);
}

.card-front {
    background: var(--color-secondary);
    transform: rotateY(180deg);
    font-size: 54px;
}

.card.matched .card-front {
    background: var(--color-accent);
}

.card:active:not(.flipped):not(.matched) {
    transform: scale(0.97);
}

/* Footer */
.footer {
    display: none;
}

.footer a {
    color: var(--color-text-muted);
    text-decoration: none;
    font-size: 12px;
}

/* Remaining label (timed mode) */
.remaining-label {
    font-family: var(--font-primary);
    font-size: 20px;
    font-weight: 400;
    color: var(--color-accent);
    margin-bottom: 6px;
}

/* Best time display */
.best-time-display {
    display: block;
    margin-bottom: 2px;
}

.best-time-display .time {
    font-family: var(--font-primary);
    font-size: 30px;
    font-weight: 300;
    line-height: 30px;
    color: var(--color-accent);
}

.best-time-display .time .ms {
    font-family: var(--font-primary);
    font-size: 22px;
    font-weight: 300;
    line-height: 30px;
}

/* Win card */
.win-card {
    display: none;
    width: 100%;
    height: 100%;
    background: var(--color-accent);
    border-radius: var(--radius-card);
    padding: var(--padding-mobile);
    flex-direction: column;
    justify-content: space-between;
    opacity: 0;
    transform: scale(0.95);
}

.win-card.visible {
    display: flex;
}

.win-card.show {
    opacity: 1;
    transform: scale(1);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.win-card-content {
    display: flex;
    flex-direction: column;
}

.win-emoji {
    height: 90px;
    width: 90px;
    object-fit: contain;
    margin-bottom: 20px;
}

.win-title {
    font-family: var(--font-primary);
    font-size: 50px;
    font-weight: 400;
    line-height: 50px;
    color: var(--color-bg);
}

.play-again-btn {
    width: 100%;
    height: var(--btn-height);
    background: var(--color-text);
    border: none;
    border-radius: var(--radius-btn);
    font-family: var(--font-primary);
    font-size: 20px;
    font-weight: 400;
    line-height: 100%;
    color: var(--color-bg);
    cursor: pointer;
    transition: opacity 0.2s;
    margin-top: auto;
}

.play-again-btn:hover {
    opacity: 0.8;
}

.play-again-btn:active {
    transform: scale(0.98);
}

/* Hide desktop sound button on mobile */
.sound-btn-desktop {
    display: none;
}

/* ==================== */
/* DESKTOP LAYOUT 601px+ */
/* ==================== */
@media (min-width: 601px) {
    body {
        overflow: auto;
    }

    .game-wrapper {
        height: auto;
        min-height: 100vh;
        padding: var(--padding-desktop-v) var(--padding-desktop-h);
        overflow: visible;
    }

    /* Header - only logo */
    .header {
        position: absolute;
        top: var(--padding-desktop-v);
        left: var(--padding-desktop-h);
        right: var(--padding-desktop-h);
        width: auto;
        margin-bottom: 0;
    }

    .logo {
        height: 36px;
    }

    /* Hide sound button from header on desktop */
    .header .sound-btn {
        display: none;
    }

    /* Test button - center of screen in header */
    .test-btn {
        position: absolute;
        left: 50%;
        top: var(--padding-desktop-v);
        transform: translateX(-50%);
    }

    /* Timer wrapper - top right */
    .timer-wrapper {
        position: absolute;
        top: var(--padding-desktop-v);
        right: var(--padding-desktop-h);
        margin-top: 0;
        display: flex;
        flex-direction: column;
        align-items: flex-end;
    }

    /* Sound button - bottom left */
    .sound-btn-desktop {
        display: flex;
        position: absolute;
        bottom: var(--padding-desktop-v);
        left: var(--padding-desktop-h);
        width: var(--sound-btn-desktop-size);
        height: var(--sound-btn-desktop-size);
        border: 1px solid var(--color-text);
        border-radius: 8px;
        background: transparent;
        cursor: pointer;
        align-items: center;
        justify-content: center;
    }

    .sound-btn-desktop svg {
        width: 16px;
        height: 16px;
    }

    /* Footer - hidden on desktop */
    .footer {
        display: none;
    }

    /* Main Screen - desktop */
    .main-screen {
        overflow: visible;
        padding: 0;
        align-items: center;
        justify-content: center;
        position: relative;
    }

    .main-title-area {
        margin: 0;
        overflow: visible;
        flex: none;
        align-self: stretch;
        position: static;
    }

    .main-title {
        position: absolute;
    }

    .mode-cards {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        width: 400px;
        z-index: 2;
    }

    .main-credit {
        position: absolute;
        bottom: 20px;
        right: 20px;
        margin-top: 0;
        text-align: right;
    }

    /* Game container - centered */
    .game-container {
        flex: 1;
        margin-top: 0;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .game-board {
        max-width: 320px;
        height: auto;
        grid-template-rows: none;
        gap: var(--gap-grid);
    }

    .card {
        aspect-ratio: 1;
    }

    .card-face {
        border-radius: var(--radius-card-desktop);
    }

    .card-front {
        font-size: 54px;
    }

    /* Win card - same size as game board */
    .win-card {
        max-width: 320px;
        width: 100%;
        height: auto;
        aspect-ratio: 3 / 4;
    }
}

/* ==================== */
/* LARGE DESKTOP 1440px+ */
/* ==================== */
@media (min-width: 1440px) {
    .game-wrapper {
        padding: var(--padding-desktop-v) var(--padding-desktop-lg-h);
    }

    .header {
        top: var(--padding-desktop-v);
        left: var(--padding-desktop-lg-h);
        right: var(--padding-desktop-lg-h);
    }

    .timer-wrapper {
        right: var(--padding-desktop-lg-h);
    }

    .sound-btn-desktop {
        left: var(--padding-desktop-lg-h);
    }

    .game-board {
        max-width: 360px;
        gap: var(--gap-grid);
    }

    .win-card {
        max-width: 360px;
    }
}