/* === MODERN DARK THEME RESET === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* === TYPOGRAPHY === */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-lg);
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    background: linear-gradient(135deg, var(--text-primary) 0%, rgba(245, 247, 250, 0.8) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.75rem);
    background: linear-gradient(135deg, var(--text-primary) 0%, rgba(245, 247, 250, 0.85) 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: clamp(1.25rem, 2.5vw, 1.5rem); }
h5 { font-size: 1.125rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
}

.lead {
    font-size: 1.25rem;
    font-weight: 400;
    line-height: 1.7;
    color: var(--text-secondary);
}

/* === LINKS === */
a {
    color: var(--primary);
    text-decoration: none;
    transition: all var(--transition-fast);
    position: relative;
}

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

a:focus {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* === CONTAINERS & LAYOUTS === */
.main-content {
    min-height: 100vh;
    background: var(--bg-primary);
    padding-top: 80px;
}

section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* === CUSTOM SCROLLBAR === */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--surface);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* === ANIMATIONS === */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

@keyframes glow {
    0%, 100% { box-shadow: var(--shadow-primary); }
    50% { box-shadow: var(--glow-primary); }
}

/* === UTILITY CLASSES === */
.fade-in {
    animation: fadeIn 0.6s var(--transition-base) both;
}

.slide-up {
    animation: fadeInUp 0.7s var(--transition-base) both;
}

.slide-left {
    animation: slideInLeft 0.7s var(--transition-base) both;
}

.slide-right {
    animation: slideInRight 0.7s var(--transition-base) both;
}

.scale-in {
    animation: scaleIn 0.5s var(--transition-base) both;
}

/* === TEXT UTILITIES === */
.text-primary { color: var(--text-primary) !important; }
.text-secondary { color: var(--text-secondary) !important; }
.text-tertiary { color: var(--text-tertiary) !important; }
.text-muted { color: var(--text-muted) !important; }
.text-accent { color: var(--primary) !important; }

.text-gradient {
    background: linear-gradient(135deg, var(--primary-light), var(--primary-dark));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* === BACKGROUND UTILITIES === */
.bg-primary { background: var(--bg-primary) !important; }
.bg-secondary { background: var(--bg-secondary) !important; }
.bg-tertiary { background: var(--bg-tertiary) !important; }
.bg-surface { background: var(--surface) !important; }
.bg-gradient { background: var(--gradient-surface) !important; }

/* === CARD STYLES === */
.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--border-light);
}

.card-glass {
    background: rgba(30, 36, 51, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--border);
}

/* === BUTTONS === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    line-height: 1.5;
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    white-space: nowrap;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow-primary);
    filter: brightness(1.1);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border);
}

.btn-secondary:hover {
    background: var(--surface-hover);
    border-color: var(--primary);
}

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

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

.btn-lg {
    padding: var(--space-md) var(--space-2xl);
    font-size: 1.125rem;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

/* === BADGES === */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-full);
    background: var(--surface);
    color: var(--text-secondary);
    border: 1px solid var(--border);
}

.badge-primary {
    background: rgba(12, 172, 92, 0.15);
    color: var(--primary);
    border-color: var(--primary);
}

.badge-success {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
    border-color: var(--success);
}

/* === FORMS === */
.form-control {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(12, 172, 92, 0.15);
    background: var(--surface-hover);
}

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

/* === LOADING STATES === */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--surface) 25%,
        var(--surface-hover) 50%,
        var(--surface) 75%
    );
    background-size: 200% 100%;
    animation: loading 1.5s infinite;
    border-radius: var(--radius-md);
}

@keyframes loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* === DIVIDERS === */
hr {
    border: none;
    height: 1px;
    background: var(--divider);
    margin: var(--space-xl) 0;
}

.divider-gradient {
    height: 2px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--primary),
        transparent
    );
}

/* === RESPONSIVE === */
@media (max-width: 768px) {
    section {
        padding: var(--space-2xl) 0;
    }

    .container {
        padding: 0 var(--space-md);
    }
}

/* === FOCUS VISIBLE === */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* === SELECTION === */
::selection {
    background: var(--primary);
    color: white;
}

::-moz-selection {
    background: var(--primary);
    color: white;
}