/* ============================================
   NORTHOPS RE - Complete Website Stylesheet
   Version: 1.0.0
   ============================================ */

:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --primary-lighter: #334155;
    --accent: #c2410c;
    --accent-light: #ea580c;
    --accent-glow: rgba(194, 65, 12, 0.12);
    --accent-glow-strong: rgba(194, 65, 12, 0.25);
    --text: #334155;
    --text-light: #64748b;
    --text-muted: #94a3b8;
    --text-white: rgba(255, 255, 255, 0.9);
    --text-white-muted: rgba(255, 255, 255, 0.6);
    --bg: #ffffff;
    --bg-warm: #fafaf9;
    --bg-cream: #f5f5f4;
    --bg-dark: #0f172a;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --success: #059669;
    --warning: #d97706;
    --error: #dc2626;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-md: 0 6px 12px -2px rgb(0 0 0 / 0.1), 0 3px 6px -3px 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);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --max-width: 1280px;
    --nav-height: 72px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-height);
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--text);
    background: var(--bg);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

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

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }
h4 { font-size: 1.125rem; }

p {
    font-size: 1rem;
    line-height: 1.7;
    color: var(--text-light);
}

.text-serif {
    font-family: var(--font-serif);
}

.text-gradient {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   LAYOUT
   ============================================ */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.container-narrow {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: 100px 0;
    position: relative;
}

.section-alt {
    background: var(--bg-warm);
}

.section-dark {
    background: var(--primary);
    color: white;
}

.section-header {
    max-width: 640px;
    margin-bottom: 64px;
}

.section-header-center {
    max-width: 640px;
    margin: 0 auto 64px;
    text-align: center;
}

.section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-label .line {
    width: 24px;
    height: 2px;
    background: var(--accent);
}

.section-label-white {
    color: var(--accent-light);
}

.section-label-white .line {
    background: var(--accent-light);
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 700;
    color: var(--primary);
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

.section-dark .section-title {
    color: white;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-light);
    line-height: 1.7;
}

.section-dark .section-desc {
    color: var(--text-white-muted);
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
    transition: var(--transition);
}

.nav.scrolled {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--nav-height);
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--primary);
}

.logo-icon {
    width: 36px;
    height: 36px;
    background: var(--primary);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.1rem;
    font-weight: 700;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.9rem;
    transition: var(--transition);
    position: relative;
}

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

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: var(--transition);
}

.nav-links a:hover::after {
    width: 100%;
}

.nav-links a.active {
    color: var(--primary);
    font-weight: 600;
}

.nav-links a.active::after {
    width: 100%;
}

.nav-cta {
    display: flex;
    gap: 12px;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    color: var(--primary);
}

/* ============================================
   BUTTONS
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    white-space: nowrap;
}

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

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

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1.5px solid var(--border);
}

.btn-outline:hover {
    border-color: var(--primary);
    background: var(--bg-warm);
}

.btn-accent {
    background: var(--accent);
    color: white;
    box-shadow: 0 4px 14px rgba(194, 65, 12, 0.3);
}

.btn-accent:hover {
    background: var(--accent-light);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(194, 65, 12, 0.4);
}

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

.btn-white:hover {
    background: var(--bg-warm);
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: white;
    border: 1.5px solid rgba(255, 255, 255, 0.3);
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.5);
}

.btn-lg {
    padding: 14px 32px;
    font-size: 1rem;
    border-radius: 10px;
}

.btn-full {
    width: 100%;
}

/* ============================================
   CARDS
   ============================================ */
.card {
    background: white;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

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

.card-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    font-size: 1.5rem;
}

.card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 12px;
}

.card p {
    font-size: 0.95rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ============================================
   GRIDS
   ============================================ */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }

    .section {
        padding: 80px 0;
    }
}

@media (max-width: 768px) {
    .nav-links, .nav-cta {
        display: none;
    }

    .mobile-toggle {
        display: block;
    }

    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }

    .section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 40px;
    }
}

/* ============================================
   SCROLLBAR
   ============================================ */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 4px;
}

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