/* CSS Custom Properties for Theme Switching */
:root {
    /* Light Theme (default) */
    --color-bg-primary: #F6F5F2;
    --color-bg-secondary: #FFFFFF;
    --color-text-primary: #2A2A2A;
    --color-text-secondary: #8E8E8E;
    --color-heading: #0F2E22;
    --color-accent: #1F4B3A;
    --color-accent-bg: rgba(31, 75, 58, 0.1);
    --color-accent-border: rgba(31, 75, 58, 0.3);
    --color-pulse: #F47AA6;
    --color-gold: #E6B65C;
}

[data-theme="dark"] {
    /* Dark Theme */
    --color-bg-primary: #0B1F18;
    --color-bg-secondary: #12352A;
    --color-text-primary: #F4F3EF;
    --color-text-secondary: #B7C3BC;
    --color-heading: #F4F3EF;
    --color-accent: #B7C3BC;
    --color-accent-bg: rgba(18, 53, 42, 0.5);
    --color-accent-border: rgba(183, 195, 188, 0.3);
    --color-pulse: #F47AA6;
    --color-gold: #E6B65C;
}

/* Auto dark mode based on system preference */
@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg-primary: #0B1F18;
        --color-bg-secondary: #12352A;
        --color-text-primary: #F4F3EF;
        --color-text-secondary: #B7C3BC;
        --color-heading: #F4F3EF;
        --color-accent: #B7C3BC;
        --color-accent-bg: rgba(18, 53, 42, 0.5);
        --color-accent-border: rgba(183, 195, 188, 0.3);
        --color-pulse: #F47AA6;
        --color-gold: #E6B65C;
    }
}

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

body {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'DM Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--color-bg-primary);
    color: var(--color-text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    position: relative;
    overflow: hidden;
}

/* Subtle animated background gradient */
body::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(
        circle at center,
        rgba(244, 122, 166, 0.35) 0%,
        rgba(247, 163, 141, 0.25) 30%,
        rgba(249, 194, 125, 0.15) 60%,
        transparent 80%
    );
    animation: bgShift 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

/* Stronger gradient for dark mode */
[data-theme="dark"] body::before {
    background: radial-gradient(
        circle at center,
        rgba(244, 122, 166, 0.12) 0%,
        rgba(247, 163, 141, 0.08) 25%,
        rgba(249, 194, 125, 0.04) 50%,
        transparent 70%
    );
}

@keyframes bgShift {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(10%, 10%) rotate(90deg); }
    50% { transform: translate(0, 20%) rotate(180deg); }
    75% { transform: translate(-10%, 10%) rotate(270deg); }
}

.container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 2rem;
    max-width: 600px;
    animation: fadeInUp 1s ease-out forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.logo-img {
    width: 120px;
    height: auto;
    margin-bottom: 1.5rem;
    animation: float 3s ease-in-out infinite;
    transition: transform 0.3s ease;
}

.logo-img:hover {
    transform: scale(1.1);
    animation-play-state: paused;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* Subtle glow for dark mode */
[data-theme="dark"] .logo-img {
    filter: drop-shadow(0 0 20px rgba(244, 122, 166, 0.4)) brightness(1.1);
}

.logo-text {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: var(--color-heading);
}

h1 {
    font-family: 'Lora', Georgia, serif;
    font-size: 1.25rem;
    font-weight: 400;
    font-style: italic;
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

.status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-size: 0.9rem;
    color: var(--color-accent);
}

.pulse {
    width: 10px;
    height: 10px;
    background: var(--color-pulse);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(1.2); }
}

.footer {
    font-family: 'Lora', Georgia, serif;
    margin-top: 3rem;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    background: var(--color-accent-bg);
    border: 1px solid var(--color-accent-border);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease, border-color 0.3s ease;
    animation: fadeIn 1s ease-out 0.5s forwards;
    opacity: 0;
}

@keyframes fadeIn {
    to { opacity: 1; }
}

.theme-toggle:hover {
    background: var(--color-accent-border);
}

.theme-icon {
    font-size: 1.25rem;
    line-height: 1;
}

/* Show sun in dark mode, moon in light mode */
.theme-icon--light {
    display: none;
}

.theme-icon--dark {
    display: block;
}

[data-theme="dark"] .theme-icon--light {
    display: block;
}

[data-theme="dark"] .theme-icon--dark {
    display: none;
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) .theme-icon--light {
        display: block;
    }
    :root:not([data-theme="light"]) .theme-icon--dark {
        display: none;
    }
}