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

/* ============================================================
   Design System — Global Variables
   ============================================================ */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --bg-color: #f9fafb;
    --white: #ffffff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --success: #16a34a;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --error: #dc2626;
    --error-light: #fee2e2;
    --border-color: #e2e8f0;
    --footer-bg: #0b1220;
    --footer-text: #94a3b8;
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-6: 48px;
    --space-8: 64px;
    --space-10: 80px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
}

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

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-color);
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-dark);
}

h1 { font-size: 2.5rem; letter-spacing: -0.025em; }
h2 { font-size: 2rem; letter-spacing: -0.02em; }
h3 { font-size: 1.25rem; }
h4 { font-size: 1.1rem; }

p { color: var(--text-light); }

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.15s ease;
}

ul { list-style: none; }

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

/* ============================================================
   Layout Utilities
   ============================================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
}

.section-padding {
    padding: var(--space-10) 0;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: var(--radius);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    font-family: inherit;
    line-height: 1.4;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

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

.btn-outline:hover {
    background: var(--primary-light);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--text-light);
    border: none;
    padding: 8px 12px;
}

.btn-ghost:hover {
    color: var(--text-dark);
    background: var(--bg-color);
}

/* ============================================================
   Cards
   ============================================================ */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--space-3);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border-color);
    transition: box-shadow 0.2s ease, transform 0.2s ease;
}

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

/* ============================================================
   Navigation (Landing Page)
   ============================================================ */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px var(--space-3);
}

.logo img {
    height: 36px;
}

.nav-links {
    display: flex;
    gap: var(--space-4);
}

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-light);
    transition: color 0.15s;
    padding: 4px 0;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
}

.nav-auth {
    display: flex;
    gap: 12px;
    align-items: center;
}

.menu-btn {
    display: none;
    cursor: pointer;
    color: var(--text-dark);
}

/* ============================================================
   Hero Section
   ============================================================ */
.hero {
    padding: var(--space-10) 0 var(--space-8);
    text-align: center;
    background: linear-gradient(180deg, var(--white) 0%, var(--bg-color) 100%);
}

.hero h1 {
    font-size: 3.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.15;
    margin-bottom: var(--space-3);
    background: linear-gradient(135deg, var(--text-dark) 0%, var(--primary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.2rem;
    color: var(--text-light);
    max-width: 640px;
    margin: 0 auto var(--space-4);
    line-height: 1.7;
}

.hero-btns {
    display: flex;
    gap: var(--space-2);
    justify-content: center;
    flex-wrap: wrap;
}

.hero-btns .btn {
    padding: 14px 28px;
    font-size: 1rem;
}

/* ============================================================
   Premium Footer (Shared — Landing + Dashboard)
   ============================================================ */
.premium-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    padding: var(--space-8) 0 0;
    font-size: 0.875rem;
    line-height: 1.7;
    margin-top: auto;
}

.premium-footer .footer-inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-3);
}

.premium-footer .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
    gap: var(--space-6);
    padding-bottom: var(--space-6);
}

.premium-footer .footer-brand {
    padding-right: var(--space-4);
}

.premium-footer .footer-brand img {
    height: 32px;
    filter: brightness(0) invert(1);
    margin-bottom: var(--space-2);
}

.premium-footer .footer-brand .tagline {
    color: var(--footer-text);
    font-size: 0.875rem;
    line-height: 1.7;
    margin-bottom: var(--space-3);
}

.premium-footer .footer-col h4 {
    color: #e2e8f0;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 700;
    margin-bottom: var(--space-2);
}

.premium-footer .footer-col ul {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.premium-footer .footer-col a {
    color: var(--footer-text);
    font-size: 0.875rem;
    transition: color 0.15s, padding-left 0.15s;
}

.premium-footer .footer-col a:hover {
    color: #e2e8f0;
    padding-left: 4px;
}

.premium-footer .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: var(--space-3) 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.premium-footer .footer-bottom p {
    color: var(--footer-text);
    font-size: 0.8rem;
    opacity: 0.7;
}

.premium-footer .footer-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    color: var(--footer-text);
}

.premium-footer .footer-status .status-indicator {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #22c55e;
    box-shadow: 0 0 6px rgba(34, 197, 94, 0.5);
    animation: statusPulse 2s ease-in-out infinite;
}

@keyframes statusPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.premium-footer .footer-social {
    display: flex;
    gap: 16px;
    margin-top: var(--space-3);
}

.premium-footer .footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.06);
    color: var(--footer-text);
    transition: background 0.2s, color 0.2s, transform 0.2s;
}

.premium-footer .footer-social a:hover {
    background: rgba(255, 255, 255, 0.12);
    color: #e2e8f0;
    transform: translateY(-2px);
}

/* ============================================================
   About Page
   ============================================================ */
.about-hero {
    padding: var(--space-10) 0 var(--space-8);
    text-align: center;
    background: linear-gradient(180deg, var(--white) 0%, var(--bg-color) 100%);
}

.about-hero h1 {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-3);
}

.about-hero p {
    font-size: 1.15rem;
    max-width: 700px;
    margin: 0 auto;
    line-height: 1.8;
}

.about-section {
    padding: var(--space-8) 0;
}

.about-section:nth-child(even) {
    background: var(--white);
}

.about-section h2 {
    margin-bottom: var(--space-3);
}

.about-section .lead {
    font-size: 1.05rem;
    color: var(--text-light);
    max-width: 720px;
    line-height: 1.8;
}

.about-problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.about-problem-card {
    padding: var(--space-3);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    border-left: 4px solid var(--error);
    transition: transform 0.2s, box-shadow 0.2s;
}

.about-problem-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.about-problem-card h4 {
    margin-bottom: 8px;
    color: var(--text-dark);
}

.about-problem-card p {
    font-size: 0.9rem;
}

.about-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.about-step {
    text-align: center;
    padding: var(--space-3) var(--space-2);
}

.about-step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-color);
    color: var(--white);
    font-weight: 800;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-2);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.about-step h4 {
    margin-bottom: 6px;
}

.about-step p {
    font-size: 0.85rem;
}

.about-audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.about-audience-card {
    padding: var(--space-4);
    background: var(--white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    text-align: center;
    transition: transform 0.2s, box-shadow 0.2s;
}

.about-audience-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.about-audience-card .icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-2);
}

.about-audience-card h4 {
    margin-bottom: 8px;
}

.about-trust-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
}

.about-trust-item {
    display: flex;
    gap: var(--space-2);
    align-items: flex-start;
    padding: var(--space-3);
    background: var(--success-light);
    border-radius: var(--radius-lg);
    border: 1px solid #bbf7d0;
}

.about-trust-item .icon-wrap {
    flex-shrink: 0;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--success);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
}

.about-trust-item h4 {
    margin-bottom: 4px;
    color: #166534;
}

.about-trust-item p {
    font-size: 0.9rem;
    color: #15803d;
}

.about-vision-box {
    background: linear-gradient(135deg, var(--primary-color) 0%, #4f46e5 100%);
    color: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--space-6) var(--space-4);
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-vision-box h2 {
    color: var(--white);
    margin-bottom: var(--space-2);
}

.about-vision-box p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.1rem;
    line-height: 1.8;
    max-width: 640px;
    margin: 0 auto;
}

/* ============================================================
   Form Inputs (Shared)
   ============================================================ */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--text-dark);
    background: var(--white);
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
}

input:focus,
textarea:focus,
select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ============================================================
   Badge
   ============================================================ */
.badge {
    padding: 4px 10px;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ============================================================
   Status borders (metric cards)
   ============================================================ */
.status-border-success { border-left: 4px solid var(--success); }
.status-border-error { border-left: 4px solid var(--error); }
.status-border-warning { border-left: 4px solid var(--warning); }

/* ============================================================
   Responsive — Landing Page
   ============================================================ */
@media (max-width: 768px) {
    .nav-links,
    .nav-auth {
        display: none;
    }

    .menu-btn {
        display: flex;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .hero-btns {
        flex-direction: column;
        align-items: center;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .section-padding {
        padding: var(--space-6) 0;
    }

    /* Footer responsive */
    .premium-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-4);
    }

    .premium-footer .footer-brand {
        padding-right: 0;
    }

    .premium-footer .footer-bottom {
        flex-direction: column;
        text-align: center;
        gap: var(--space-2);
    }

    /* About responsive */
    .about-hero h1 {
        font-size: 2rem;
    }

    .about-vision-box {
        padding: var(--space-4) var(--space-3);
    }
}

@media (max-width: 1024px) {
    .premium-footer .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: var(--space-4);
    }
}

@media (max-width: 640px) {
    .premium-footer .footer-grid {
        grid-template-columns: 1fr;
    }
}