/* =========================================
   GLOBAL STYLES & THEME
   ========================================= */
:root {
    --bg-color: #101014;
    --grid-bg: #1c1c24;
    --text-color: #ffffff;
    --accent-color: #ff4757;
    --preview-color: #2ed573;
    --leaderboard-bg: #23232d;
    --tile-gap: 6px;
    --tile-radius: 8px;
    --cols: 5;
    --rows: 7;
}

* { box-sizing: border-box; user-select: none; -webkit-user-select: none; }

html, body { height: 100%; width: 100%; overflow: hidden; }

body {
    margin: 0; padding: 0;
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    touch-action: none;
}

/* STARTSKJERM */
.start-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: var(--bg-color); z-index: 2000;
    display: flex; justify-content: center; align-items: center;
    transition: transform 0.4s ease-in-out;
}
.start-hidden { transform: translateY(-100%); pointer-events: none; }

.start-content {
    text-align: center; width: 90%; max-width: 350px;
    display: flex; flex-direction: column; gap: 20px;
}

.start-content h1 {
    font-size: 4rem; margin: 0; color: var(--accent-color);
    text-shadow: 0 5px 15px rgba(255, 71, 87, 0.4); letter-spacing: -2px;
}
.subtitle { color: #888; margin-top: -10px; margin-bottom: 30px; font-weight: 300; }

.difficulty-menu { display: flex; flex-direction: column; gap: 15px; }

.diff-btn {
    background: var(--grid-bg); border: 2px solid #333;
    padding: 20px; border-radius: 12px; cursor: pointer;
    transition: all 0.2s; text-align: left; position: relative;
    display: flex; flex-direction: column;
}
.diff-btn:hover { border-color: var(--accent-color); transform: translateY(-2px); background: #252530; }
.diff-btn:active { transform: scale(0.98); }

.diff-title { font-size: 1.2rem; font-weight: 900; color: #fff; letter-spacing: 1px; }
.diff-desc { font-size: 0.8rem; color: #888; margin-top: 4px; }
.start-info { font-size: 0.8rem; color: #555; margin-top: 20px; }


/* LAYOUT */
.app-container {
    display: flex; width: 100%; height: 100%;
    justify-content: center; align-items: center;
    gap: 40px; padding: 20px;
}

.game-wrapper {
    display: flex; flex-direction: column; align-items: center; position: relative;
}

/* LEADERBOARD */
.leaderboard-panel {
    background: var(--leaderboard-bg);
    width: 250px; height: 500px; 
    border-radius: 12px; padding: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    overflow-y: auto;
}
.leaderboard-panel h3 {
    margin-top: 0; color: var(--accent-color); text-align: center;
    text-transform: uppercase; letter-spacing: 1px; font-size: 1rem;
    border-bottom: 2px solid rgba(255,255,255,0.1); padding-bottom: 10px;
}
#leaderboard-list { list-style: none; padding: 0; margin: 0; }
#leaderboard-list li {
    display: flex; justify-content: space-between; padding: 8px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05); font-size: 0.9rem;
}
#leaderboard-list li span.name { font-weight: bold; color: #ddd; }
#leaderboard-list li span.score { color: var(--preview-color); }

/* HEADER & SCORES */
header {
    width: 100%; max-width: 400px; padding: 10px 0 20px 0;
    display: flex; justify-content: space-between; align-items: center;
    z-index: 20; position: relative; 
}

/* NY: Container for høyre side (Beste + knapp) */
.header-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.score-container {
    background: var(--grid-bg); padding: 8px 16px;
    border-radius: 8px; text-align: center; min-width: 70px; 
}
.best-container .score-label { color: #ffd700; }
.score-label { font-size: 0.6rem; opacity: 0.7; display: block; text-transform: uppercase; letter-spacing: 1px;}
.score-value { font-size: 1.1rem; font-weight: 800; display: block; color: var(--accent-color); }

/* RESTART/MENU KNAPP */
button.restart-btn {
    background: transparent; border: none; color: rgba(255,255,255,0.6);
    padding: 8px; cursor: pointer; transition: all 0.2s;
    display: flex; align-items: center; justify-content: center;
}
button.restart-btn:hover { color: white; transform: scale(1.1); }
button.restart-btn:active { transform: scale(0.9); }

/* PREVIEW */
#preview-container {
    position: absolute; left: 50%; top: 45%; 
    transform: translate(-50%, -50%);
    background: rgba(46, 213, 115, 0.1);
    border: 1px solid rgba(46, 213, 115, 0.2);
    padding: 4px 15px; border-radius: 15px;
    display: flex; flex-direction: column; align-items: center;
    transition: all 0.15s ease-out; pointer-events: none; z-index: 30;
}
.preview-hidden { opacity: 0; transform: translate(-50%, 0%) scale(0.8) !important; }
.preview-label { font-size: 0.5rem; text-transform: uppercase; letter-spacing: 1px; opacity: 0.8; color: #fff; margin-bottom: 0;}
#preview-value { font-size: 1.3rem; line-height: 1.1; font-weight: 900; color: var(--preview-color); text-shadow: 0 0 10px rgba(46, 213, 115, 0.4); }

/* SPILLBRETT */
#game-container {
    position: relative; width: 95vw; max-width: 380px; aspect-ratio: 5 / 7; 
    max-height: 75vh; background: var(--grid-bg); border-radius: 12px;
    touch-action: none; z-index: 1; box-shadow: 0 10px 30px rgba(0,0,0,0.3);
}
#connector-canvas { position: absolute; top: 0; left: 0; width: 100%; height: 100%; pointer-events: none; z-index: 0; }
.grid { position: relative; width: 100%; height: 100%; overflow: hidden; border-radius: 12px; pointer-events: none; }

/* BRIKKER */
.tile {
    position: absolute; display: flex; align-items: center; justify-content: center;
    font-size: 2rem; font-weight: 900; color: var(--bg-color); text-shadow: none; 
    border-radius: var(--tile-radius); z-index: 2;
    transition: transform 0.15s cubic-bezier(0.6, 0.05, 0.2, 1), background-color 0.15s;
    will-change: transform; border: none; padding: 0; margin: 0;
    width: calc((100% - (var(--cols) + 1) * var(--tile-gap)) / var(--cols));
    height: calc((100% - (var(--rows) + 1) * var(--tile-gap)) / var(--rows));
    box-shadow: inset 0 -3px 0 rgba(0,0,0,0.1); pointer-events: auto; 
}
.tile.selected { z-index: 3; filter: brightness(1.1); transform: scale(0.9); box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.5); }
.tile.exploding { animation: explode 0.4s ease-out forwards; z-index: 10; pointer-events: none; }

@keyframes explode {
    0% { transform: scale(1); opacity: 1; }
    40% { transform: scale(1.4); opacity: 0.9; background-color: #fff !important; }
    100% { transform: scale(0); opacity: 0; }
}

/* MODALER */
.modal-overlay {
    position: fixed; top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(0,0,0,0.9); display: none; justify-content: center; align-items: center;
    z-index: 2100; flex-direction: column; backdrop-filter: blur(5px); border: none; color: var(--text-color);
}
.modal-content {
    background: #2b2b36; padding: 30px; border-radius: 16px; text-align: center; 
    width: 90%; max-width: 320px; box-shadow: 0 10px 30px rgba(0,0,0,0.5); color: var(--text-color);
}
.modal-content h2 { margin-top: 0; color: var(--accent-color); font-size: 2rem; margin-bottom: 10px;}
.modal-content p { color: #ddd; line-height: 1.5; }
.modal-content input {
    width: 100%; padding: 15px; margin: 20px 0; border-radius: 8px; border: 2px solid #444;
    background: #1a1a20; color: white; font-size: 1.1rem; text-align: center;
}
.modal-content button {
    width: 100%; padding: 15px; background: var(--accent-color); color: white;
    border: none; border-radius: 8px; font-size: 1.1rem; font-weight: bold; cursor: pointer;
}
#api-status { font-size: 0.8rem; color: #888; margin-top:15px; }

/* KNAPPER I MODAL */
.modal-buttons { display: flex; margin-top: 20px; justify-content: center; }
.modal-buttons-column { flex-direction: column; gap: 10px; }
.modal-buttons button { width: 100%; padding: 12px; font-size: 0.95rem; }
.btn-cancel { background-color: #3a3a45 !important; color: #fff; }
.btn-cancel:hover { background-color: #4a4a55 !important; }
.btn-confirm { background-color: var(--accent-color) !important; box-shadow: 0 4px 12px rgba(255, 71, 87, 0.3); }

/* RESPONSIVE */
@media (max-width: 800px) {
    .app-container { flex-direction: column; padding: 10px; gap: 20px; justify-content: flex-start; height: auto; overflow-y: auto; }
    body { overflow-y: auto; }
    .game-wrapper { order: 1; }
    .leaderboard-panel { order: 2; width: 95vw; max-width: 380px; height: auto; max-height: 300px; }
    #game-container { width: 95vw; height: auto; min-height: 120vw; max-height: none;}
    .tile { font-size: 1.6rem; }
    header { padding: 10px 0; }
}