/* =========================================
   1. Design Tokens & Theme Setup
   ========================================= */
:root {
    /* Fonts */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-script: 'Dancing Script', cursive;

    /* Spacing (Fluid) */
    --space-xs: clamp(0.5rem, 1vw, 0.75rem);
    --space-sm: clamp(0.75rem, 1.5vw, 1rem);
    --space-md: clamp(1.25rem, 2.5vw, 1.5rem);
    --space-lg: clamp(2rem, 4vw, 3rem);

    /* Animation */
    --ease-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --duration: 0.3s;
}

/* Light Mode (Warm Paper & Forest Green) */
:root {
    --bg-body: #fdfaf6;
    --bg-glass: #ffffffcc; /* 80% opacity */
    --bg-glass-border: #ffffff;
    
    --text-primary: #1a2e1f;
    --text-secondary: #4a5d50;
    --text-muted: #6e7a72;
    --text-on-accent: #ffffff;
    
    --accent-primary: #2f6f3e;
    --accent-hover: #1e4a29;
    --accent-glow: #2f6f3e33;
    
    --shadow-card: 0 8px 32px 0 #1f268726;
}

/* Dark Mode (Midnight Navy & Luxe Gold) */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-body: #020c1b;
        --bg-glass: #020c1bbf; /* 75% opacity */
        --bg-glass-border: #ffffff1a;
        
        --text-primary: #e6f1ff;
        --text-secondary: #8892b0;
        --text-muted: #606a80;
        --text-on-accent: #020c1b;
        
        --accent-primary: #ffd700;
        --accent-hover: #d4b200;
        --accent-glow: #ffd7004d;
        
        --shadow-card: 0 8px 32px 0 #00000080;
    }
}

/* =========================================
   2. Global Reset & Layout
   ========================================= */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    
    /* Background Ambience */
    background-image: 
        radial-gradient(circle at 0% 0%, var(--accent-glow) 0%, transparent 50%),
        radial-gradient(circle at 100% 100%, var(--accent-glow) 0%, transparent 50%);
    background-attachment: fixed;

    /* Flex Layout to Center Content */
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm);
}

/* =========================================
   3. Main Container
   ========================================= */
.container {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    
    /* Container Query Context */
    container-type: inline-size;
    container-name: card;
    
    display: flex;
    flex-direction: column;
    align-items: center;
}

header {
    text-align: left;
    margin-bottom: var(--space-md);
    animation: fadeDown 0.6s var(--ease-smooth) forwards;
}

h1 {
    font-family: var(--font-script);
    font-size: clamp(2.5rem, 6vw, 4rem);
    color: var(--accent-primary);
    line-height: 1.1;
    text-shadow: 0 4px 15px var(--accent-glow);
}

/* =========================================
   4. Glass Card Component
   ========================================= */
.card {
    background: var(--bg-glass);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--bg-glass-border);
    border-radius: clamp(1rem, 2.5vw, 2rem);
    box-shadow: var(--shadow-card);
    padding: var(--space-md) var(--space-lg);
    width: 100%;
    
    /* Entrance Animation */
    animation: fadeUp 0.6s var(--ease-smooth) forwards;
    opacity: 0;
    transform: translateY(20px);
}

.about-us p {
    font-size: clamp(0.9rem, 1vw, 1rem);
    color: var(--text-secondary);
    margin-bottom: var(--space-sm);
    text-align: left;
}

.about-us p:last-child {
    margin-bottom: 0;
}

/* =========================================
   5. Action Buttons
   ========================================= */
.actions {
    display: flex;
    justify-content: center;
    margin: var(--space-sm) 0;
}

.btn-login {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: var(--accent-primary);
    color: var(--text-on-accent);
    font-weight: 600;
    text-decoration: none;
    padding: 1em 3em;
    border-radius: 50px;
    letter-spacing: 0.03em;
    box-shadow: 0 4px 15px var(--accent-glow);
    transition: transform 0.2s var(--ease-smooth), box-shadow 0.2s var(--ease-smooth);
}

.btn-login:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px var(--accent-glow);
    background-color: var(--accent-hover);
}

.btn-login:active {
    transform: translateY(-1px);
}

.btn-login:focus-visible {
    outline: 2px solid var(--text-primary);
    outline-offset: 4px;
}

/* =========================================
   6. Disclaimer Section
   ========================================= */
.disclaimer {
    border-top: 1px solid var(--bg-glass-border);
    padding-top: var(--space-md);
    text-align: left;
}

.disclaimer h2 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent-primary);
    margin-bottom: var(--space-xs);
    opacity: 0.9;
}

.disclaimer p {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.6;
    max-width: 90%;
    margin: 0 auto;
}

/* =========================================
   7. Footer Links (Outside Card)
   ========================================= */
.footer-links {
    margin-top: var(--space-md);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--space-sm);
    text-align: left;
    
    animation: fadeUp 0.6s var(--ease-smooth) 0.2s forwards;
    opacity: 0;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-links a:hover {
    color: var(--accent-primary);
    text-decoration: underline;
    text-underline-offset: 4px;
}

/* =========================================
   8. Animations & Queries
   ========================================= */

@keyframes fadeUp {
    to { opacity: 1; transform: translateY(0); }
}

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

/* App Shell Desktop Logic */
@media (min-width: 768px) {
    body {
        height: 100vh; /* Lock to single screen */
        overflow: hidden; /* Prevent scroll unless content is too tall */
    }
    
    /* If height is too small, allow scroll */
    @media (max-height: 700px) {
        body {
            height: auto;
            overflow-y: auto;
            padding: var(--space-lg) var(--space-sm);
        }
    }
}

/* Container Query for Mobile Layouts */
@container card (max-width: 400px) {
    .card {
        padding: var(--space-md) var(--space-sm);
    }
    
    h1 {
        font-size: 2.8rem;
    }
    
    .btn-login {
        width: 100%; /* Full width button on small screens */
    }
    
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
}