@import url('https://fonts.googleapis.com/css2?family=Orbitron:wght@400;700;900&family=Rajdhani:wght@400;600&display=swap');

/* =============================================
   CUSTOM PROPERTIES
   ============================================= */
:root {
    --bg-dark:        #07071a;
    --bg-panel:       rgba(12, 12, 35, 0.85);
    --border-subtle:  #1a1a3e;
    --border-accent:  #2a2a6a;
    --accent-cyan:    #00f5ff;
    --accent-danger:  #ff3366;
    --accent-gold:    #ffd700;
    --text-primary:   #dde0ff;
    --text-muted:     #6060a0;
    --radius:         12px;
    --radius-sm:      8px;
    --transition:     all 0.2s ease;
    --glow-cyan:      0 0 16px rgba(0, 245, 255, 0.4);
    --glow-cyan-sm:   0 0 8px  rgba(0, 245, 255, 0.25);
    --glow-danger:    0 0 20px rgba(255, 51, 102, 0.4);
    --glow-gold:      0 0 12px rgba(255, 215, 0, 0.4);
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after {
    box-sizing: border-box;
}

body {
    font-family: 'Rajdhani', sans-serif;
    background-color: var(--bg-dark);
    background-image:
        radial-gradient(ellipse at 15% 50%, rgba(0, 80, 200, 0.07) 0%, transparent 60%),
        radial-gradient(ellipse at 85% 15%, rgba(140, 0, 255, 0.05) 0%, transparent 55%);
    color: var(--text-primary);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    min-height: 100vh;
    margin: 0;
}

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1 {
    font-family: 'Orbitron', sans-serif;
    font-size: 3em;
    font-weight: 900;
    letter-spacing: 10px;
    text-transform: uppercase;
    margin: 28px 0 18px;
    color: var(--accent-cyan);
    text-shadow:
        0 0 18px var(--accent-cyan),
        0 0 40px rgba(0, 245, 255, 0.35);
    animation: titlePulse 4s ease-in-out infinite;
}

@keyframes titlePulse {
    0%, 100% {
        text-shadow: 0 0 18px var(--accent-cyan), 0 0 40px rgba(0, 245, 255, 0.35);
    }
    50% {
        text-shadow: 0 0 28px var(--accent-cyan), 0 0 60px rgba(0, 245, 255, 0.55), 0 0 90px rgba(0, 245, 255, 0.15);
    }
}

h2 {
    font-family: 'Orbitron', sans-serif;
    text-align: center;
    letter-spacing: 3px;
    font-size: 0.8em;
    color: var(--text-muted);
    text-transform: uppercase;
}

/* =============================================
   UTILITY
   ============================================= */
.hidden             { display: none !important; }
.text-align-left    { text-align: left   !important; }
.text-align-center  { text-align: center !important; }
.text-align-right   { text-align: right  !important; }

/* =============================================
   START SCREEN
   ============================================= */
#start-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-direction: column;
    padding: 20px;
}

#start-button,
#resume-button {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.3em;
    font-weight: 700;
    letter-spacing: 3px;
    padding: 16px 52px;
    cursor: pointer;
    background: linear-gradient(135deg, #003d80, #0077bb);
    color: #fff;
    border: 1px solid rgba(0, 245, 255, 0.4);
    border-radius: var(--radius);
    box-shadow: var(--glow-cyan-sm), inset 0 1px 0 rgba(255, 255, 255, 0.08);
    transition: var(--transition);
    text-transform: uppercase;
}

#start-button:hover,
#resume-button:hover {
    background: linear-gradient(135deg, #0055aa, #00aadd);
    box-shadow: var(--glow-cyan), 0 6px 24px rgba(0, 0, 0, 0.4);
    transform: translateY(-2px);
}

#resume-button {
    margin-top: 12px;
}

#start-screen-leaderboard-button {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.75em;
    letter-spacing: 2px;
    padding: 10px 24px;
    margin-top: 14px;
    cursor: pointer;
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-sm);
    transition: var(--transition);
    text-transform: uppercase;
}

#start-screen-leaderboard-button:hover {
    color: var(--accent-cyan);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan-sm);
}

/* =============================================
   INSTRUCTIONS
   ============================================= */
#instructions,
#mobile-instructions {
    margin-top: 28px;
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 20px 28px;
    max-width: 420px;
    backdrop-filter: blur(6px);
}

#instructions h2,
#mobile-instructions h2 {
    color: var(--text-muted);
    margin-top: 0;
    margin-bottom: 14px;
    font-size: 0.72em;
}

#instructions ul,
#mobile-instructions ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

#instructions li,
#mobile-instructions li {
    margin-bottom: 9px;
    font-size: 0.95em;
    color: var(--text-muted);
}

#instructions strong,
#mobile-instructions strong {
    color: var(--text-primary);
}

/* Ve vychozim stavu skryjeme mobilni instrukce */
#mobile-instructions {
    display: none;
}

/* =============================================
   GAME CONTAINER
   ============================================= */
#game-container {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    background: var(--bg-panel);
    border: 1px solid var(--border-subtle);
    border-radius: 16px;
    padding: 16px;
    box-shadow:
        0 0 50px rgba(0, 245, 255, 0.04),
        0 24px 64px rgba(0, 0, 0, 0.55);
    touch-action: pan-y;
    backdrop-filter: blur(12px);
    position: relative;
}

canvas#tetris {
    border: 1px solid var(--border-accent);
    border-radius: 4px;
    background-color: #050512;
    box-shadow:
        0 0 24px rgba(0, 245, 255, 0.06),
        inset 0 0 40px rgba(0, 0, 20, 0.6);
    display: block;
}

/* =============================================
   INFO PANEL
   ============================================= */
#info {
    width: 155px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

#info > div {
    background: rgba(8, 8, 28, 0.75);
    border: 1px solid var(--border-subtle);
    padding: 12px;
    border-radius: 10px;
}

#info h2 {
    margin-top: 0;
    margin-bottom: 8px;
    font-size: 0.65em;
    letter-spacing: 3px;
}

#score {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.55em;
    font-weight: 700;
    text-align: center;
    margin: 0;
    color: var(--accent-gold);
    text-shadow: var(--glow-gold);
}

canvas#next {
    background-color: #050512;
    border: 1px solid var(--border-subtle);
    border-radius: 4px;
    display: block;
    margin: 8px auto 0;
}

/* =============================================
   BUTTONS (in-game panel)
   ============================================= */
#leaderboard-button,
#close-leaderboard,
#pause-button,
#new-game-button {
    display: block;
    width: 100%;
    margin-top: 8px;
    padding: 9px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.6em;
    letter-spacing: 1px;
    font-weight: 700;
    background: linear-gradient(135deg, #0d1a33, #162244);
    color: var(--accent-cyan);
    border: 1px solid #1e3060;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
    text-transform: uppercase;
}

#leaderboard-button:hover,
#close-leaderboard:hover,
#pause-button:hover,
#new-game-button:hover {
    background: linear-gradient(135deg, #162244, #243a70);
    border-color: rgba(0, 245, 255, 0.5);
    box-shadow: var(--glow-cyan-sm);
}

/* =============================================
   GAME OPTIONS
   ============================================= */
#game-options label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.8em;
    color: var(--text-muted);
    cursor: pointer;
    transition: color 0.2s;
}

#game-options label:hover {
    color: var(--text-primary);
}

#game-options label:last-of-type {
    margin-bottom: 0;
}

#game-options input[type="checkbox"] {
    accent-color: var(--accent-cyan);
    margin-right: 5px;
}

/* =============================================
   PAUSE OVERLAY
   ============================================= */
#pause-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(5, 5, 20, 0.78);
    color: var(--accent-cyan);
    font-family: 'Orbitron', sans-serif;
    font-size: 3em;
    font-weight: 900;
    letter-spacing: 12px;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 50;
    text-shadow:
        0 0 20px var(--accent-cyan),
        0 0 50px rgba(0, 245, 255, 0.4);
    backdrop-filter: blur(5px);
}

/* =============================================
   GAME OVER
   ============================================= */
#game-over-screen {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(7, 7, 22, 0.96);
    border: 1px solid var(--accent-danger);
    padding: 24px 22px;
    border-radius: var(--radius);
    text-align: center;
    z-index: 10;
    box-shadow: var(--glow-danger), 0 20px 50px rgba(0, 0, 0, 0.7);
    min-width: 210px;
    backdrop-filter: blur(10px);
}

#game-over-screen h2 {
    color: var(--accent-danger);
    text-shadow: var(--glow-danger);
    font-size: 0.95em;
    letter-spacing: 3px;
}

#game-over-stats {
    margin: 12px 0;
    font-size: 0.88em;
    color: var(--text-muted);
    text-align: left;
}

#game-over-stats p {
    margin: 6px 0;
}

#game-over-stats strong {
    color: var(--text-primary);
}

#player-name {
    display: block;
    margin: 12px auto;
    padding: 9px 12px;
    width: 100%;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--border-accent);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: 'Rajdhani', sans-serif;
    font-size: 1em;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#player-name:focus {
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan-sm);
}

#submit-score {
    padding: 10px 18px;
    width: 100%;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.65em;
    letter-spacing: 1px;
    font-weight: 700;
    background: linear-gradient(135deg, #003060, #0055a0);
    color: var(--accent-cyan);
    border: 1px solid #005090;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
}

#submit-score:hover {
    background: linear-gradient(135deg, #004488, #0077cc);
    box-shadow: var(--glow-cyan-sm);
}

/* =============================================
   LEADERBOARD
   ============================================= */
#leaderboard-screen {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(7, 7, 22, 0.97);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 24px;
    z-index: 200;
    width: 85%;
    max-width: 520px;
    box-shadow:
        0 0 40px rgba(0, 245, 255, 0.06),
        0 24px 64px rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(12px);
}

#leaderboard-screen h2 {
    font-size: 0.95em;
    letter-spacing: 4px;
    margin-top: 0;
    color: var(--accent-cyan);
}

#leaderboard-container {
    max-height: 60vh;
    overflow-y: auto;
    margin-bottom: 15px;
    scrollbar-width: thin;
    scrollbar-color: var(--border-accent) transparent;
}

#leaderboard-container table {
    width: 100%;
    border-collapse: collapse;
}

#leaderboard-container th,
#leaderboard-container td {
    padding: 9px 12px;
    border-bottom: 1px solid #10102a;
    text-align: left;
    font-size: 0.9em;
}

#leaderboard-container th {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.6em;
    letter-spacing: 2px;
    color: var(--text-muted);
    background: transparent;
    border-bottom: 1px solid var(--border-subtle);
}

#leaderboard-container td.no-bottom-border {
    border-bottom: none;
}

#leaderboard-container .row-even {
    background-color: rgba(255, 255, 255, 0.02);
}

#leaderboard-container .mode {
    text-align: center;
    cursor: default;
}

#leaderboard-container .mode-special {
    color: gold;
    font-size: 1.4em;
}

#leaderboard-container .mode-standard {
    color: #404060;
}

/* =============================================
   PERFECT CLEAR BONUS
   ============================================= */
#perfect-clear-bonus {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.9), rgba(255, 140, 0, 0.9));
    color: #060606;
    padding: 16px 32px;
    border-radius: var(--radius);
    font-family: 'Orbitron', sans-serif;
    font-size: 1.2em;
    font-weight: 700;
    text-align: center;
    z-index: 100;
    animation: none;
}

#perfect-clear-bonus:not(.hidden) {
    animation: fadeInOut 2s ease-in-out forwards;
}

@keyframes fadeInOut {
    0%   { opacity: 0; transform: translate(-50%, -50%) scale(0.8); }
    20%  { opacity: 1; transform: translate(-50%, -50%) scale(1.1); }
    80%  { opacity: 1; transform: translate(-50%, -50%) scale(1);   }
    100% { opacity: 0; transform: translate(-50%, -50%) scale(0.9); }
}

/* =============================================
   FOOTER
   ============================================= */
footer {
    margin-top: 22px;
    color: #28285a;
    font-size: 0.8em;
    text-align: center;
    padding-bottom: 14px;
    letter-spacing: 1px;
}

footer a {
    color: #38387a;
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--text-muted);
}

#game-container footer {
    display: none;
}

/* =============================================
   MOBILE CONTROLS
   ============================================= */
#mobile-controls {
    margin-top: 14px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(2, 1fr);
    gap: 8px;
    width: 240px;
    touch-action: manipulation;
}

#mobile-controls button {
    padding: 14px;
    font-size: 1.4em;
    background: rgba(8, 8, 30, 0.85);
    color: var(--accent-cyan);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}

#mobile-controls button:active {
    background: rgba(0, 245, 255, 0.1);
    border-color: var(--accent-cyan);
    box-shadow: var(--glow-cyan-sm);
}

#mobile-rotate { grid-column: 2 / 3; grid-row: 1 / 2; }
#mobile-left   { grid-column: 1 / 2; grid-row: 1 / 2; }
#mobile-right  { grid-column: 3 / 4; grid-row: 1 / 2; }
#mobile-down   { grid-column: 2 / 3; grid-row: 2 / 3; }
#mobile-drop   { grid-column: 1 / 4; grid-row: 2 / 3; font-size: 1em; }

/* =============================================
   RESPONSIVE — MOBILE
   ============================================= */
@media (max-width: 600px) {
    body {
        padding: 0 5px;
    }

    h1 {
        font-size: 1.8em;
        letter-spacing: 5px;
        margin: 10px 0 8px;
    }

    #game-container {
        flex-direction: column;
        align-items: center;
        position: relative;
        width: 100%;
        border: none;
        padding: 0;
        background: transparent;
        box-shadow: none;
        backdrop-filter: none;
        height: 85vh;
    }

    canvas#tetris {
        width: 100%;
        height: auto;
        border: 1px solid var(--border-subtle);
    }

    #info {
        order: 3;
        margin-left: 0;
        margin-top: 15px;
        width: 100%;
        flex-direction: row;
        justify-content: space-between;
        flex-wrap: wrap;
        background: none;
        padding: 0;
        gap: 5px;
    }

    #info div:nth-child(1) {
        position: fixed;
        top: 0;
        right: 0;
        background: rgba(7, 7, 22, 0.88);
        border-radius: 0 0 0 8px;
        margin: 0;
        padding: 5px;
        z-index: 5;
        border: none;
        border-left: 1px solid var(--border-subtle);
        border-bottom: 1px solid var(--border-subtle);
    }

    #info div:nth-child(1) h2 {
        display: none;
    }

    canvas#next {
        width: 60px;
        height: 60px;
        margin: 0;
    }

    #info div:nth-child(2),
    #info #game-options {
        flex-basis: 49%;
        margin: 5px 0;
        box-sizing: border-box;
    }

    #mobile-controls {
        order: 2;
        display: none;
    }

    .mobile-gesture-hide {
        display: none !important;
    }

    #instructions {
        display: none;
    }

    #mobile-instructions {
        display: block;
    }

    #start-screen.hidden ~ footer {
        display: none;
    }

    #leaderboard-container th,
    #leaderboard-container td {
        padding: 8px 1px;

        &:first-child {
            padding-left: 5px;
        }
    }
}