/* ====== InsightFlow AI — Common Styles ====== */
/* Shared variables, fonts, base, background effects, glassmorphism */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --text-primary: #f0f0f5;
    --text-secondary: #8a8a9a;
    --text-muted: #5a5a6a;
    --accent-1: #6c5ce7;
    --accent-2: #a29bfe;
    --accent-3: #00cec9;
    --accent-gradient: linear-gradient(135deg, #6c5ce7 0%, #a29bfe 50%, #00cec9 100%);
    --glow-purple: rgba(108, 92, 231, 0.15);
    --glow-cyan: rgba(0, 206, 201, 0.15);
    --success: #00b894;
    --error: #e74c3c;
    --warning: #fdcb6e;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 16px 48px rgba(0, 0, 0, 0.4);
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    min-height: 100vh;
}

/* ====== Background Effects ====== */
.bg-grid {
    position: fixed;
    inset: 0;
    z-index: 0;
    background-image:
        linear-gradient(rgba(108, 92, 231, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(108, 92, 231, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

.bg-glow {
    position: fixed;
    width: 500px;
    height: 500px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.3;
    pointer-events: none;
    z-index: 0;
}

.bg-glow-1 {
    top: -200px;
    right: -100px;
    background: var(--glow-purple);
    animation: float 8s ease-in-out infinite;
}

.bg-glow-2 {
    bottom: -200px;
    left: -100px;
    background: var(--glow-cyan);
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

/* ====== Navbar ====== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 0.75rem 2rem;
    backdrop-filter: blur(20px);
    background: rgba(10, 10, 15, 0.85);
    border-bottom: 1px solid var(--border-subtle);
}

.navbar-inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    font-weight: 800;
    font-size: 1.15rem;
    color: var(--text-primary);
}

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--accent-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    list-style: none;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-links a:hover { color: var(--text-primary); }

.nav-links a.active {
    color: var(--accent-3);
}

/* ====== Buttons ====== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.4rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.85rem;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 4px 16px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(108, 92, 231, 0.4);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

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

.btn-secondary:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
}

/* ====== Glassmorphism Card ====== */
.glass-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.glass-card:hover {
    border-color: var(--border-hover);
    box-shadow: var(--shadow-md);
}

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

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

@keyframes pulse-border {
    0%, 100% { border-color: rgba(108, 92, 231, 0.3); }
    50% { border-color: rgba(108, 92, 231, 0.7); }
}

@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.animate-in {
    animation: fadeInUp 0.5s ease forwards;
}

.skeleton {
    background: linear-gradient(90deg, var(--bg-card) 25%, rgba(255,255,255,0.06) 50%, var(--bg-card) 75%);
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

/* ====== Responsive ====== */
@media (max-width: 768px) {
    .navbar { padding: 0.6rem 1rem; }
    .nav-links { gap: 1rem; }
}