/* Reset & Bas */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    transition: background 0.8s ease;
    overflow-x: hidden;
    -webkit-tap-highlight-color: transparent;
}

/* Tema-variabler */
:root {
    --bg-gradient: linear-gradient(135deg, #0f0c29, #302b63, #24243e);
    --glass-bg: rgba(255, 255, 255, 0.08);
    --glass-border: rgba(255, 255, 255, 0.15);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --accent-color: #00f2ff;
    --shadow-glow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body[data-theme="cyberpunk"] {
    --bg-gradient: linear-gradient(135deg, #0d0221, #1a0b2e, #2d1b69);
    --accent-color: #ff007f;
    --shadow-glow: 0 8px 40px rgba(255, 0, 127, 0.3);
}
body[data-theme="aurora"] {
    --bg-gradient: linear-gradient(135deg, #0f2027, #203a43, #2c5364);
    --accent-color: #00ff88;
    --shadow-glow: 0 8px 40px rgba(0, 255, 136, 0.25);
}
body[data-theme="space"] {
    --bg-gradient: linear-gradient(135deg, #000000, #0f0c29, #302b63);
    --accent-color: #7b2ff7;
    --shadow-glow: 0 8px 40px rgba(123, 47, 247, 0.3);
}
body[data-theme="sunset"] {
    --bg-gradient: linear-gradient(135deg, #2c3e50, #fd746c, #ff9068);
    --accent-color: #ffd700;
    --shadow-glow: 0 8px 40px rgba(255, 215, 0, 0.2);
}
body[data-theme="frost"] {
    --bg-gradient: linear-gradient(135deg, #e6e9f0, #eef1f5, #d9e2ec);
    --glass-bg: rgba(255, 255, 255, 0.45);
    --glass-border: rgba(255, 255, 255, 0.6);
    --text-primary: #1a1a2e;
    --text-secondary: rgba(26, 26, 46, 0.7);
    --accent-color: #00bfff;
    --shadow-glow: 0 8px 32px rgba(0, 191, 255, 0.2);
}

body { background: var(--bg-gradient); color: var(--text-primary); }

/* Layout */
.app-container {
    width: 100%;
    max-width: 480px;
    min-height: 100vh;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.app-header { text-align: center; margin-bottom: 0.5rem; }
h1 { font-size: 2.2rem; font-weight: 700; letter-spacing: -0.5px; }
.accent-text { color: var(--accent-color); }
.app-header p { color: var(--text-secondary); margin-top: 0.3rem; font-size: 1rem; }

/* Tema-väljare */
.theme-selector {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.8rem;
}
@media (min-width: 400px) { .theme-selector { grid-template-columns: repeat(3, 1fr); } }

.theme-btn {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    padding: 0.9rem;
    border-radius: 16px;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: all 0.3s ease;
    touch-action: manipulation;
}
.theme-btn.active, .theme-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    border-color: var(--accent-color);
    box-shadow: 0 0 15px var(--accent-color);
}

/* Glasspanel */
.glass-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 28px;
    padding: 2rem 1.5rem;
    box-shadow: var(--shadow-glow);
    text-align: center;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    animation: float 6s ease-in-out infinite;
}

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

/* Andningscirkel */
.breath-circle-container {
    position: relative;
    width: 240px;
    height: 240px;
    margin: 1rem auto;
    display: flex;
    justify-content: center;
    align-items: center;
}

.breath-ring {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    border: 4px solid var(--accent-color);
    box-shadow: 0 0 20px var(--accent-color), inset 0 0 20px rgba(255,255,255,0.1);
    transform: scale(0.8);
    transition: transform 4s ease-in-out;
}

.breath-ring.inhale { transform: scale(1.15); }
.breath-ring.exhale { transform: scale(0.8); }

.breath-text {
    font-size: 1.4rem;
    font-weight: 600;
    z-index: 2;
    color: var(--text-primary);
}

.timer-display {
    position: absolute;
    bottom: -35px;
    font-family: 'SF Mono', monospace, system-ui;
    font-size: 1.4rem;
    color: var(--accent-color);
    letter-spacing: 2px;
}

/* Kontroller */
.controls { display: flex; gap: 1rem; justify-content: center; margin-top: 1rem; }
.control-btn {
    padding: 1rem 2.5rem;
    border-radius: 50px;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: transform 0.2s, box-shadow 0.3s;
    touch-action: manipulation;
}
.control-btn.primary {
    background: var(--accent-color);
    color: #000;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}
.control-btn.secondary {
    background: transparent;
    border: 2px solid var(--glass-border);
    color: var(--text-primary);
}
.control-btn:active { transform: scale(0.95); }

.instruction-text {
    margin-top: 1.5rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

.app-footer { text-align: center; padding-bottom: 1rem; color: var(--text-secondary); font-size: 0.85rem; }