@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* ==========================================================================
   Design Tokens & Variables
   ========================================================================== */
:root {
    /* Primary Colors (Vibrant Blue/Purple) */
    --primary-hue: 245;
    --primary-saturation: 85%;
    --primary: hsl(var(--primary-hue), var(--primary-saturation), 60%);
    --primary-hover: hsl(var(--primary-hue), var(--primary-saturation), 50%);
    --primary-light: hsl(var(--primary-hue), var(--primary-saturation), 95%);
    --primary-glow: hsla(var(--primary-hue), var(--primary-saturation), 60%, 0.4);

    /* Status Colors */
    --success: hsl(145, 65%, 45%);
    --warning: hsl(45, 95%, 55%);
    --danger: hsl(350, 75%, 55%);
    --info: hsl(200, 85%, 50%);

    /* Light Theme (Default) */
    --bg-main: hsl(210, 20%, 98%);
    --bg-surface: hsl(0, 0%, 100%);
    --bg-glass: rgba(255, 255, 255, 0.7);
    --border-color: rgba(0, 0, 0, 0.08);
    --text-main: hsl(220, 30%, 15%);
    --text-muted: hsl(220, 15%, 45%);
    
    /* Shadows & Effects */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.08);
    --glass-blur: blur(12px);

    /* Radii */
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 24px;
    --radius-pill: 9999px;

    /* Transitions */
    --trans-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --trans-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Theme Overlay (Activated via attribute) */
[data-theme="dark"] {
    --bg-main: hsl(220, 25%, 8%);
    --bg-surface: hsl(220, 25%, 12%);
    --bg-glass: rgba(30, 35, 45, 0.6);
    --border-color: rgba(255, 255, 255, 0.08);
    --text-main: hsl(0, 0%, 98%);
    --text-muted: hsl(220, 15%, 70%);
    --primary-light: hsl(220, 30%, 15%);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
}

/* ==========================================================================
   Base Reset & Typography
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--text-main);
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--trans-fast);
}

a:hover {
    color: var(--primary-hover);
}

/* ==========================================================================
   Layout & Glassmorphism Utilities
   ========================================================================== */
.glass-panel {
    background: var(--bg-glass);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==========================================================================
   Forms & Inputs
   ========================================================================== */
.form-group {
    margin-bottom: 1.5rem;
    position: relative;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--text-muted);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-main);
    background-color: var(--bg-surface);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    transition: all var(--trans-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px var(--primary-glow);
    background-color: var(--bg-main);
}

.form-control::placeholder {
    color: var(--text-muted);
    opacity: 0.6;
}

/* ==========================================================================
   Buttons
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--trans-normal);
    gap: 8px;
}

.btn-primary {
    background-color: var(--primary);
    color: white;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-outline {
    background-color: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background-color: var(--primary-light);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-slide-up {
    animation: slideUpFade 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ==========================================================================
   Utility Classes
   ========================================================================== */
.text-center { text-align: center; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }
.w-100 { width: 100%; }
.d-flex { display: flex; }
.align-items-center { align-items: center; }
.justify-content-between { justify-content: space-between; }
.text-muted { color: var(--text-muted); }
.text-sm { font-size: 0.875rem; }