:root {
    --primary: #EC4899;
    --primary-hover: #DB2777;
    --secondary: #F472B6;
    --accent: #06B6D4;
    --accent-hover: #0891B2;
    --bg-dark: #140A0F;
    --bg-panel: rgba(30, 15, 23, 0.7);
    --border-color: rgba(236, 72, 153, 0.3);
    --text-main: #FDF2F8;
    --text-muted: #FBCFE8;
    --success: #10B981;
    --danger: #EF4444;
    --font-stack: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: var(--font-stack);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background-image: 
        radial-gradient(circle at 15% 50%, rgba(236, 72, 153, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(6, 182, 212, 0.08), transparent 25%);
}

/* Utilities */
.hidden { display: none !important; }
.mt-4 { margin-top: 1rem; }
.mt-2 { margin-top: 0.5rem; }
.w-full { width: 100%; }

/* Glassmorphism */
.glass-panel {
    background: var(--bg-panel);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

/* Typography */
h1, h2, h3 { font-weight: 700; }
h1 { font-size: 1.5rem; color: var(--primary); display: flex; align-items: center; gap: 0.5rem; }
h2 { font-size: 1.25rem; margin-bottom: 0.5rem; }
h3 { font-size: 1rem; margin-bottom: 0.75rem; color: var(--secondary); text-transform: uppercase; letter-spacing: 0.05em;}

/* Layout */
.app-container {
    max-w-7xl;
    margin: 0 auto;
    padding: 1rem 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    width: 100%;
    max-width: 1200px;
}

.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1.5rem;
}

.logo-icon {
    font-size: 1.5rem;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.timer {
    font-family: monospace;
    font-size: 1.25rem;
    background: rgba(0,0,0,0.3);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.main-content {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 2rem;
    align-items: start;
}

@media (max-width: 768px) {
    .main-content { grid-template-columns: 1fr; }
}

/* Sidebar Elements */
.level-info { padding: 1.5rem; }
.difficulty { color: var(--accent); font-weight: 500; font-size: 0.9rem; margin-bottom: 1rem; }
.progress-bar {
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
    margin-bottom: 0.5rem;
}
.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    width: 0%;
    transition: width 0.3s ease;
}
.stats { font-size: 0.8rem; color: var(--text-muted); text-align: right; }

.controls { padding: 1.5rem; }
.control-buttons { display: flex; flex-direction: column; gap: 0.75rem; }
.daily-challenge { padding: 1.5rem; text-align: center;}
.daily-challenge p { font-size: 0.9rem; color: var(--text-muted); }

/* Buttons */
.btn {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    font-size: 0.9rem;
    font-family: inherit;
}
.btn-primary { background: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-hover); transform: translateY(-1px); }
.btn-secondary { background: var(--accent); color: white; }
.btn-secondary:hover { background: var(--accent-hover); transform: translateY(-1px); }
.btn-danger { background: transparent; border: 1px solid var(--danger); color: var(--danger); }
.btn-danger:hover { background: rgba(239, 68, 68, 0.1); }
.btn-ghost { background: transparent; color: var(--text-muted); }
.btn-ghost:hover { color: white; background: rgba(255,255,255,0.05); }
.btn-outline { background: transparent; border: 1px solid var(--border-color); color: var(--text-main); }
.btn-outline:hover { background: rgba(236, 72, 153, 0.1); }

/* Game Area */
.game-area { display: flex; flex-direction: column; gap: 1rem; }
.puzzle-container { padding: 2rem; display: flex; flex-direction: column; align-items: center; min-height: 500px; }
.puzzle-header { width: 100%; display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }

/* Grid System */
.grid-wrapper {
    display: flex;
    flex-direction: column;
    align-items: flex-end; /* Align right to keep row clues close to grid */
    gap: 0.5rem;
    overflow-x: auto;
    max-width: 100%;
}

.clues-top {
    display: flex;
    justify-content: flex-start;
    padding-left: 200px; /* Space for row clues */
    gap: 4px;
}

.clue-col {
    width: 60px;
    height: 120px;
    writing-mode: vertical-rl;
    text-orientation: mixed;
    transform: rotate(180deg);
    display: flex;
    align-items: center;
    justify-content: flex-start;
    font-family: monospace;
    font-size: 1rem;
    color: var(--accent);
    padding-top: 0.5rem;
    letter-spacing: 2px;
}

.grid-main-row {
    display: flex;
    gap: 0.5rem;
}

.clues-left {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: 4px;
    width: 190px;
    text-align: right;
    padding-right: 0.5rem;
}

.clue-row {
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: flex-end;
    font-family: monospace;
    font-size: 1rem;
    color: var(--secondary);
    letter-spacing: 1px;
    word-break: break-all;
}

.grid {
    display: grid;
    gap: 4px;
    background: var(--border-color);
    padding: 4px;
    border-radius: 8px;
}

.cell {
    width: 60px;
    height: 60px;
    background: rgba(20, 10, 15, 0.9);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 4px;
    color: white;
    font-size: 1.5rem;
    font-weight: 700;
    font-family: monospace;
    text-align: center;
    text-transform: uppercase;
    transition: all 0.2s ease;
    outline: none;
}

.cell:focus {
    background: rgba(236, 72, 153, 0.2);
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(236, 72, 153, 0.3);
}

.cell.valid { color: var(--success); text-shadow: 0 0 8px rgba(16, 185, 129, 0.5); }
.cell.invalid { color: var(--danger); text-shadow: 0 0 8px rgba(239, 68, 68, 0.5); animation: shake 0.4s; }
.cell.hint { background: rgba(6, 182, 212, 0.2); border-color: var(--accent); }

.feedback-message {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 8px;
    text-align: center;
    font-weight: 600;
    min-height: 50px;
    width: 100%;
    transition: all 0.3s ease;
    opacity: 0;
}
.feedback-message.show { opacity: 1; }
.feedback-success { background: rgba(16, 185, 129, 0.1); color: var(--success); border: 1px solid var(--success); }
.feedback-error { background: rgba(239, 68, 68, 0.1); color: var(--danger); border: 1px solid var(--danger); }

/* Modals */
.modal-overlay {
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    display: flex; justify-content: center; align-items: center;
    z-index: 100;
    opacity: 0; pointer-events: none; transition: opacity 0.3s;
}
.modal-overlay.active { opacity: 1; pointer-events: auto; }
.modal {
    width: 90%; max-width: 500px;
    padding: 2rem;
    transform: translateY(20px); transition: transform 0.3s;
}
.modal-overlay.active .modal { transform: translateY(0); }

.modal-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem;}
.btn-close { background: transparent; border: none; color: white; font-size: 1.5rem; cursor: pointer; }
.cheatsheet-table { width: 100%; border-collapse: collapse; font-size: 0.9rem; }
.cheatsheet-table th, .cheatsheet-table td { padding: 0.75rem; text-align: left; border-bottom: 1px solid rgba(255,255,255,0.1); }
.cheatsheet-table th { color: var(--accent); }
.cheatsheet-table code { background: rgba(0,0,0,0.3); padding: 0.1rem 0.3rem; border-radius: 3px; font-family: monospace; color: var(--primary); }

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