/* ============================================
   AusomeNotes - Main Stylesheet
   ============================================ */

/* ============ CSS VARIABLES ============ */
:root {
    --purple-deep: #5B21B6;
    --purple-primary: #7C3AED;
    --purple-light: #A78BFA;
    --fuchsia: #D946EF;
    --fuchsia-light: #F0ABFC;
    --white: #FFFFFF;
    --gray-50: #FAFAFA;
    --gray-100: #F4F4F5;
    --gray-200: #E4E4E7;
    --gray-400: #A1A1AA;
    --gray-600: #52525B;
    --gray-800: #27272A;
    --gray-900: #18181B;
    
    --gradient-hero: linear-gradient(135deg, #7C3AED 0%, #9333EA 35%, #C026D3 65%, #E879F9 100%);
    --gradient-accent: linear-gradient(135deg, #7C3AED 0%, #D946EF 100%);
    --gradient-soft: linear-gradient(180deg, #F5F3FF 0%, #FFFFFF 100%);
    
    --font-display: 'DM Serif Display', serif;
    --font-body: 'Plus Jakarta Sans', sans-serif;
    
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 60px rgba(124, 58, 237, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--gray-800);
    line-height: 1.6;
    background: var(--white);
    overflow-x: hidden;
}

a {
    color: var(--purple-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ============ NAVIGATION ============ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 2rem;
    transition: all 0.3s ease;
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow-md);
    padding: 0.75rem 2rem;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.nav-logo img {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    box-shadow: var(--shadow-md);
}

.nav-logo-text {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--white);
    transition: color 0.3s ease;
}

.nav.scrolled .nav-logo-text {
    color: var(--purple-primary);
}

.nav-links {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    font-size: 0.95rem;
    transition: all 0.2s ease;
}

.nav.scrolled .nav-links a {
    color: var(--gray-600);
}

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

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

.nav-cta {
    background: rgba(255, 255, 255, 0.2);
    padding: 0.6rem 1.5rem;
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: var(--white);
    color: var(--purple-primary) !important;
}

.nav.scrolled .nav-cta {
    background: var(--gradient-accent);
    color: var(--white) !important;
    border: none;
}

/* Mobile Navigation */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-mobile-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--white);
    transition: all 0.3s ease;
}

.nav.scrolled .nav-mobile-toggle span {
    background: var(--gray-800);
}

.nav-mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--white);
    padding: 1rem 2rem 2rem;
    flex-direction: column;
    gap: 1rem;
    box-shadow: var(--shadow-lg);
}

.nav-mobile-menu.active {
    display: flex;
}

.nav-mobile-menu a {
    color: var(--gray-800);
    font-weight: 500;
    padding: 0.5rem 0;
}

.nav-mobile-menu .nav-cta {
    background: var(--gradient-accent);
    color: var(--white) !important;
    text-align: center;
    border: none;
}

/* ============ BUTTONS ============ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--white);
    color: var(--purple-primary);
    padding: 1rem 2rem;
    border-radius: 60px;
    font-weight: 700;
    font-size: 1rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2), 0 0 0 0 rgba(255, 255, 255, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(124, 58, 237, 0.1), transparent);
    transition: left 0.5s ease;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3), 0 0 0 4px rgba(255, 255, 255, 0.2);
    color: var(--purple-primary);
}

.btn-primary:hover::before {
    left: 100%;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 1rem 2rem;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1rem;
    text-decoration: none;
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-2px);
    color: var(--white);
}

/* ============ SECTIONS ============ */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--gradient-accent);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 600;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    color: var(--gray-900);
    margin-bottom: 1rem;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ============ FOOTER ============ */
.footer {
    padding: 4rem 2rem 2rem;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-top {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 3rem;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.footer-logo img {
    width: 40px;
    height: 40px;
    border-radius: 10px;
}

.footer-logo-text {
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--white);
}

.footer-tagline {
    font-size: 0.95rem;
    max-width: 280px;
    line-height: 1.6;
}

.footer-column h4 {
    color: var(--white);
    font-weight: 600;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links a {
    color: var(--gray-400);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: var(--white);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

/* ============ HIGHLIGHT BOXES ============ */
.highlight-box {
    background: linear-gradient(135deg, #F5F3FF 0%, #FDF4FF 100%);
    border-left: 4px solid var(--purple-primary);
    padding: 1.5rem;
    border-radius: 0 12px 12px 0;
    margin: 1.5rem 0;
}

.highlight-box p {
    margin-bottom: 0;
    color: var(--gray-800);
}

.highlight-box.warning {
    background: linear-gradient(135deg, #FEF3C7 0%, #FEF9C3 100%);
    border-left-color: #F59E0B;
}

.highlight-box.success {
    background: linear-gradient(135deg, #DCFCE7 0%, #D1FAE5 100%);
    border-left-color: #22C55E;
}

.highlight-box.important {
    background: linear-gradient(135deg, #FEE2E2 0%, #FECACA 100%);
    border-left-color: #EF4444;
}

/* ============ DATA TABLES ============ */
.data-table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
    font-size: 0.95rem;
}

.data-table th,
.data-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--gray-200);
}

.data-table th {
    background: var(--gray-50);
    font-weight: 600;
    color: var(--gray-800);
}

.data-table td {
    color: var(--gray-600);
}

.data-table tr:last-child td {
    border-bottom: none;
}

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

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

/* ============ RESPONSIVE ============ */
@media (max-width: 1024px) {
    .footer-top {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
}

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }

    .nav-mobile-toggle {
        display: flex;
    }

    .footer-top {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-brand {
        align-items: center;
    }

    .footer-tagline {
        text-align: center;
    }

    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}