/* =============================================
   ADI DESAI - SHARED THEME
   Base styles imported by all pages
   ============================================= */

:root {
    /* COLORS */
    --color-bg: #0a0a0a;
    --color-bg-elevated: #0f0f0f;
    --color-card: #141414;
    --color-card-hover: #1a1a1a;
    --color-border: #252525;
    --color-border-hover: #3a3a3a;
    --color-text: #f5f5f5;
    --color-text-secondary: #a0a0a0;
    --color-text-tertiary: #606060;
    --color-accent: #6b8aff;
    --color-accent-secondary: #c084fc;
    --color-glow: rgba(107, 138, 255, 0.15);

    /* TYPOGRAPHY */
    --font-main: 'Sora', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-size-xs: 0.75rem;      /* 12px */
    --font-size-sm: 0.875rem;     /* 14px */
    --font-size-base: 1rem;       /* 16px */
    --font-size-md: 1.125rem;     /* 18px */
    --font-size-lg: 1.25rem;      /* 20px */
    --font-size-xl: 1.5rem;       /* 24px */
    --font-size-2xl: 2rem;        /* 32px */
    --font-size-3xl: 2.5rem;      /* 40px */
    --font-size-4xl: 3rem;        /* 48px */

    /* LINE HEIGHTS */
    --line-height-tight: 1.2;
    --line-height-base: 1.6;
    --line-height-relaxed: 1.8;

    /* FONT WEIGHTS */
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;

    /* SPACING */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    --spacing-4xl: 80px;
    --spacing-section: 120px;
    --spacing-section-mobile: 64px;
    --spacing-page: 48px;
    --spacing-page-mobile: 24px;

    /* BORDERS */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;

    /* TRANSITIONS */
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s var(--transition-smooth);
    --transition-normal: 0.25s var(--transition-smooth);
    --transition-slow: 0.4s var(--transition-smooth);

    /* Z-INDEX */
    --z-base: 1;
    --z-dropdown: 100;
    --z-sticky: 500;
    --z-nav: 900;
    --z-modal: 950;
    --z-overlay: 1000;
}

/* =============================================
   RESET & BASE
   ============================================= */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -moz-text-size-adjust: 100%;
    text-size-adjust: 100%;
}

body {
    font-family: var(--font-main);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-base);
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
}

/* =============================================
   NOISE TEXTURE
   ============================================= */
.noise {
    position: fixed;
    inset: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: var(--z-overlay);
}

/* =============================================
   TYPOGRAPHY
   ============================================= */
h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-medium);
    line-height: var(--line-height-tight);
    color: var(--color-text);
}

h1 { font-size: var(--font-size-4xl); }
h2 { font-size: var(--font-size-2xl); }
h3 { font-size: var(--font-size-xl); }
h4 { font-size: var(--font-size-lg); }
h5 { font-size: var(--font-size-md); }
h6 { font-size: var(--font-size-base); }

p {
    font-size: var(--font-size-base);
    line-height: var(--line-height-relaxed);
    color: var(--color-text-secondary);
}

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

/* =============================================
   SECTION LABELS
   ============================================= */
.section-label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
}

/* =============================================
   NAVIGATION (Shared)
   ============================================= */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-page);
    z-index: var(--z-nav);
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
}

.logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-semibold);
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-full);
    color: var(--color-accent);
    transition: var(--transition-normal);
}

.logo:hover {
    background: var(--color-accent);
    color: var(--color-bg);
    transform: scale(1.05);
}

.nav-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.nav-right a {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-normal);
    color: var(--color-text-secondary);
}

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

.nav-cta {
    padding: 10px 20px;
    border: 1px solid var(--color-accent);
    border-radius: var(--radius-full);
    color: var(--color-accent) !important;
}

.nav-cta:hover {
    background: var(--color-accent);
    color: var(--color-bg) !important;
    transform: translateY(-2px);
}

/* =============================================
   FOOTER (Shared)
   ============================================= */
.footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-page);
    border-top: 1px solid var(--color-border);
    font-size: var(--font-size-sm);
    color: var(--color-text-tertiary);
    background: var(--color-bg-elevated);
}

/* =============================================
   BACK LINK
   ============================================= */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-accent);
    margin-bottom: var(--spacing-lg);
    transition: var(--transition-fast);
}

.back-link:hover {
    gap: var(--spacing-md);
}

/* =============================================
   CARDS (Shared)
   ============================================= */
.card {
    background: var(--color-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(180deg, var(--color-accent), var(--color-accent-secondary));
    transform: scaleY(0);
    transition: var(--transition-normal);
}

.card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-2px);
}

.card:hover::before {
    transform: scaleY(1);
}

/* =============================================
   TAGS
   ============================================= */
.tag {
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    padding: 6px 14px;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    color: var(--color-text-tertiary);
    transition: var(--transition-normal);
}

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 768px) {
    :root {
        --spacing-page: var(--spacing-page-mobile);
        --spacing-section: var(--spacing-section-mobile);
    }

    .nav {
        padding: 20px var(--spacing-page-mobile);
    }

    .nav-right {
        gap: var(--spacing-md);
    }

    .nav-right a:not(.nav-cta) {
        display: none;
    }

    .footer {
        flex-direction: column;
        gap: var(--spacing-sm);
        text-align: center;
        padding: var(--spacing-lg) var(--spacing-page-mobile);
    }
}

/* =============================================
   REDUCED MOTION
   ============================================= */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        transition-duration: 0.01ms !important;
    }

    html {
        scroll-behavior: auto;
    }
}