/*
 * Kornerstone Services - Premium CSS Design System
 * Inspired by premium executive engineering and luxury architecture.
 */

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

:root {
    /* Color Palette */
    --primary-charcoal: #1A1A1A;
    --secondary-gold: #C9A35F;
    --secondary-gold-hover: #B58F4C;
    --bg-white: #FFFFFF;
    --bg-light: #F7F7F7;
    --text-dark: #222222;
    --text-muted: #666666;
    --text-light: #CCCCCC;
    --border-color: #E2E2E2;

    /* Semantic Colors */
    --color-success: #2E7D32;
    --color-success-bg: #E8F5E9;
    --color-error: #C62828;
    --color-error-bg: #FFEBEE;
    --color-info: #1565C0;
    --color-info-bg: #E3F2FD;

    /* Grid & Spacing */
    --grid-unit: 8px;
    --border-radius: 4px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 12px 24px rgba(0, 0, 0, 0.12);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-light);
    color: var(--text-dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--primary-charcoal);
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: calc(var(--grid-unit) * 2);
}

h1 { font-size: 3rem; font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: 2.25rem; font-weight: 700; letter-spacing: -0.01em; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    margin-bottom: calc(var(--grid-unit) * 3);
    color: var(--text-muted);
}

a {
    color: var(--secondary-gold);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--secondary-gold-hover);
}

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

/* Layout Utilities */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 calc(var(--grid-unit) * 3);
}

.section-padding {
    padding: calc(var(--grid-unit) * 12) 0;
}

.text-center { text-align: center; }
.text-right { text-align: right; }

.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: calc(var(--grid-unit) * 4);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: calc(var(--grid-unit) * 4);
}

/* Header & Navigation */
header {
    background-color: var(--primary-charcoal);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    border-bottom: 2px solid var(--secondary-gold);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--bg-white);
    letter-spacing: 0.05em;
}

.logo span {
    color: var(--secondary-gold);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: calc(var(--grid-unit) * 4);
    align-items: center;
}

.nav-links a {
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 0;
    position: relative;
}

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

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

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

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-nav-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--bg-white);
    margin: 5px 0;
    transition: var(--transition);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 700;
    border-radius: var(--border-radius);
    transition: var(--transition);
    cursor: pointer;
    border: 2px solid transparent;
}

.btn-primary {
    background-color: var(--secondary-gold);
    color: var(--primary-charcoal);
}

.btn-primary:hover {
    background-color: var(--secondary-gold-hover);
    color: var(--primary-charcoal);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background-color: transparent;
    border-color: var(--secondary-gold);
    color: var(--secondary-gold);
}

.btn-secondary:hover {
    background-color: var(--secondary-gold);
    color: var(--primary-charcoal);
    transform: translateY(-2px);
}

.btn-outline-dark {
    background-color: transparent;
    border-color: var(--primary-charcoal);
    color: var(--primary-charcoal);
}

.btn-outline-dark:hover {
    background-color: var(--primary-charcoal);
    color: var(--bg-white);
    transform: translateY(-2px);
}

.btn-outline-light {
    background-color: transparent;
    border-color: var(--bg-white);
    color: var(--bg-white);
}

.btn-outline-light:hover {
    background-color: var(--bg-white);
    color: var(--primary-charcoal);
}

.btn-danger-outline {
    background-color: transparent;
    border-color: var(--color-error);
    color: var(--color-error);
}

.btn-danger-outline:hover {
    background-color: var(--color-error);
    color: var(--bg-white);
    transform: translateY(-2px);
}

/* Hero Section */
.hero {
    position: relative;
    padding: calc(var(--grid-unit) * 20) 0;
    background-color: var(--primary-charcoal);
    color: var(--bg-white);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0.35;
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 650px;
}

.hero h1 {
    color: var(--bg-white);
    margin-bottom: calc(var(--grid-unit) * 3);
}

.hero p {
    color: var(--text-light);
    font-size: 1.15rem;
    margin-bottom: calc(var(--grid-unit) * 4);
}

.hero .subtext {
    color: var(--secondary-gold);
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.1em;
    font-size: 0.85rem;
    margin-bottom: calc(var(--grid-unit) * 2);
}

.btn-group {
    display: flex;
    gap: calc(var(--grid-unit) * 2);
    flex-wrap: wrap;
}

/* Cards System */
.card {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--grid-unit) * 4);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
    border-color: var(--secondary-gold);
}

.card .icon {
    font-size: 2rem;
    color: var(--secondary-gold);
    margin-bottom: calc(var(--grid-unit) * 2);
}

.card h3 {
    margin-bottom: calc(var(--grid-unit) * 2);
}

.card p {
    margin-bottom: 0;
}

/* Project Cards */
.project-card {
    background-color: var(--bg-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--secondary-gold);
}

.project-image {
    height: 240px;
    background-size: cover;
    background-position: center;
}

.project-info {
    padding: calc(var(--grid-unit) * 3);
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--secondary-gold);
    letter-spacing: 0.05em;
    display: inline-block;
    margin-bottom: 8px;
}

/* Forms Styling */
.form-container {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--grid-unit) * 5);
    box-shadow: var(--shadow-md);
}

.form-group {
    margin-bottom: calc(var(--grid-unit) * 3);
}

.form-group label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-charcoal);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--primary-charcoal);
    border-radius: var(--border-radius);
    font-family: inherit;
    font-size: 0.95rem;
    background-color: var(--bg-light);
    color: var(--text-dark);
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--secondary-gold);
    background-color: var(--bg-white);
    box-shadow: 0 0 0 3px rgba(201, 163, 95, 0.2);
}

.form-group input[type="radio"],
.form-group input[type="checkbox"] {
    width: auto;
    margin-right: 8px;
}

.form-row {
    display: flex;
    gap: calc(var(--grid-unit) * 2);
}

.form-row .form-group {
    flex: 1;
}

/* Alert Boxes */
.alert {
    padding: 16px;
    border-radius: var(--border-radius);
    margin-bottom: 24px;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
}

.alert-success {
    background-color: var(--color-success-bg);
    color: var(--color-success);
    border: 1px solid var(--color-success);
}

.alert-error {
    background-color: var(--color-error-bg);
    color: var(--color-error);
    border: 1px solid var(--color-error);
}

/* Standard List/Details styling */
.two-column {
    display: flex;
    gap: calc(var(--grid-unit) * 6);
    align-items: center;
    flex-wrap: wrap;
}

.two-column > * {
    flex: 1;
    min-width: 300px;
}

.standard-item {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
}

.standard-num {
    font-size: 2rem;
    font-weight: 800;
    color: var(--secondary-gold);
    line-height: 1;
}

.standard-content h3 {
    margin-bottom: 8px;
}

.image-wrapper img {
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
}

/* Steps Progress styling */
.process-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: calc(var(--grid-unit) * 3);
}

.process-step {
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--grid-unit) * 3);
    position: relative;
    box-shadow: var(--shadow-sm);
}

.step-box {
    position: absolute;
    top: 12px;
    right: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--secondary-gold);
    background: rgba(201, 163, 95, 0.1);
    padding: 4px 8px;
    border-radius: 2px;
}

.process-step h3 {
    margin-top: 24px;
    margin-bottom: 8px;
}

.highlight-box {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: calc(var(--grid-unit) * 4);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
}

/* Dashboard Styles */
.dashboard-layout {
    display: flex;
    min-height: calc(100vh - 80px);
    flex-wrap: wrap;
}

.dashboard-sidebar {
    width: 260px;
    background-color: var(--primary-charcoal);
    padding: calc(var(--grid-unit) * 4) 0;
    border-right: 2px solid var(--secondary-gold);
}

.dashboard-nav {
    list-style: none;
}

.dashboard-nav a {
    display: flex;
    align-items: center;
    padding: 16px 24px;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem;
    border-left: 4px solid transparent;
}

.dashboard-nav a:hover,
.dashboard-nav li.active a {
    color: var(--bg-white);
    background-color: rgba(255, 255, 255, 0.05);
    border-left-color: var(--secondary-gold);
}

.dashboard-content {
    flex: 1;
    padding: calc(var(--grid-unit) * 6);
    background-color: var(--bg-light);
    min-width: 320px;
}

.stat-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: calc(var(--grid-unit) * 3);
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: calc(var(--grid-unit) * 4);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
}

.stat-val {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--primary-charcoal);
    margin-top: 8px;
}

.stat-lbl {
    font-size: 0.85rem;
    text-transform: uppercase;
    font-weight: 700;
    color: var(--text-muted);
    letter-spacing: 0.05em;
}

/* Table Style */
.table-wrapper {
    overflow-x: auto;
    background-color: var(--bg-white);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    margin-top: 24px;
}

table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

th, td {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-light);
    font-weight: 700;
    color: var(--primary-charcoal);
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
}

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

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 2px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-success { background-color: var(--color-success-bg); color: var(--color-success); }
.badge-error { background-color: var(--color-error-bg); color: var(--color-error); }
.badge-info { background-color: var(--color-info-bg); color: var(--color-info); }

/* Footer */
footer {
    background-color: var(--primary-charcoal);
    color: var(--text-light);
    padding: calc(var(--grid-unit) * 10) 0 calc(var(--grid-unit) * 4);
    border-top: 4px solid var(--secondary-gold);
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: calc(var(--grid-unit) * 4);
    margin-bottom: calc(var(--grid-unit) * 6);
}

.footer-brand {
    grid-column: span 2;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--bg-white);
    margin-bottom: 16px;
}

.footer-logo span {
    color: var(--secondary-gold);
}

.footer-links h4 {
    color: var(--bg-white);
    font-size: 1.1rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: var(--text-light);
}

.footer-links a:hover {
    color: var(--bg-white);
    padding-left: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: calc(var(--grid-unit) * 4);
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Animations */
[data-aos] {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

[data-aos].aos-animate {
    opacity: 1;
    transform: translateY(0);
}

/* Responsive Rules */
@media (max-width: 992px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
    .footer-brand { grid-column: span 1; }
}

@media (max-width: 768px) {
    header {
        position: relative;
    }
    
    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 80px;
        left: 0;
        background-color: var(--primary-charcoal);
        padding: 24px;
        border-bottom: 2px solid var(--secondary-gold);
        box-shadow: var(--shadow-md);
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .mobile-nav-toggle {
        display: block;
    }
    
    .mobile-nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }
    
    .mobile-nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }
    
    .mobile-nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }
    
    .dashboard-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 2px solid var(--secondary-gold);
    }
    
    .dashboard-layout {
        flex-direction: column;
    }
}