/* ===================================
   Forteo - Management Consulting Landing Page
   CSS Styles
   =================================== */

/* CSS Variables */
:root {
    --color-charcoal: #111827;
    --color-charcoal-light: #1f2937;
    --color-charcoal-lighter: #374151;
    --color-white: #ffffff;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-teal: #06b6d4;
    --color-teal-dark: #0891b2;
    --color-teal-light: #22d3ee;

    --font-family: 'Manrope', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    --shadow-sm: 0 1px 2px 0 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);
}

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

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

body {
    font-family: var(--font-family);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-white);
    overflow-x: hidden;
}

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

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

ul {
    list-style: none;
}

/* Container */
.container {
    width: 100%;
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

@media (min-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }
}

@media (min-width: 1440px) {
    .container {
        padding: 0 var(--spacing-xl);
    }
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
}

h1 {
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
}

h2 {
    font-size: clamp(1.75rem, 4vw, 2.5rem);
}

h3 {
    font-size: clamp(1.25rem, 2.5vw, 1.5rem);
}

h4 {
    font-size: 1.125rem;
    font-weight: 600;
}

p {
    font-size: clamp(1rem, 1.5vw, 1.125rem);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-teal), var(--color-teal-dark));
    color: var(--color-white);
    box-shadow: 0 4px 14px 0 rgba(6, 182, 212, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--color-teal-light), var(--color-teal));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px 0 rgba(6, 182, 212, 0.5);
}

.btn-secondary {
    background: var(--color-charcoal);
    color: var(--color-white);
    box-shadow: var(--shadow-md);
}

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

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(17, 24, 39, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-white);
    letter-spacing: -0.02em;
}

.nav-toggle {
    display: flex;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    z-index: 1001;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-white);
    transition: var(--transition-normal);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

.nav-menu {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-charcoal);
    padding: var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.nav-menu a {
    color: var(--color-gray-300);
    font-weight: 500;
    padding: var(--spacing-xs) 0;
    transition: color var(--transition-fast);
}

.nav-menu a:hover {
    color: var(--color-teal);
}

@media (min-width: 768px) {
    .nav-toggle {
        display: none;
    }

    .nav-menu {
        display: flex;
        position: static;
        flex-direction: row;
        background: none;
        padding: 0;
        gap: var(--spacing-lg);
    }
}

/* Hero Section */
.hero {
    position: relative;
    min-height: 100vh;
    overflow: hidden;
}

.hero-parallax-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--color-charcoal) 0%, var(--color-charcoal-light) 100%);
    z-index: -2;
    pointer-events: none;
}

.hero-parallax-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle at 30% 70%, rgba(6, 182, 212, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 70% 30%, rgba(6, 182, 212, 0.1) 0%, transparent 40%);
    animation: parallaxFloat 20s ease-in-out infinite;
    pointer-events: none;
}

@keyframes parallaxFloat {
    0%, 100% { transform: translate(0, 0); }
    50% { transform: translate(-2%, -2%); }
}

.hero-diagonal {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    padding-top: 72px;
}

.hero-dark-panel {
    position: relative;
    background: var(--color-charcoal);
    padding: var(--spacing-2xl) var(--spacing-md);
    display: flex;
    align-items: center;
    flex: 1;
}

.hero-dark-panel::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom right, var(--color-charcoal) 49%, var(--color-white) 50%);
    pointer-events: none;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
}

.hero-title {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.hero-title .highlight {
    color: var(--color-teal);
    display: block;
}

.hero-subtitle {
    color: var(--color-gray-400);
    margin-bottom: var(--spacing-lg);
    font-size: clamp(1rem, 2vw, 1.25rem);
}

.hero-white-panel {
    background: var(--color-white);
    padding: var(--spacing-2xl) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero-image-container {
    width: 100%;
    max-width: 500px;
}

.hero-image {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.image-placeholder {
    position: relative;
    width: 100%;
    background: var(--color-gray-100);
    border-radius: 12px;
    overflow: hidden;
}

.image-placeholder svg {
    width: 100%;
    height: auto;
    display: block;
}

.image-label {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background: linear-gradient(to top, rgba(17, 24, 39, 0.9), transparent);
    color: var(--color-white);
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
}

@media (min-width: 768px) {
    .hero-diagonal {
        flex-direction: row;
    }

    .hero-dark-panel {
        width: 55%;
        padding: var(--spacing-3xl);
        clip-path: polygon(0 0, 100% 0, 85% 100%, 0 100%);
    }

    .hero-dark-panel::after {
        display: none;
    }

    .hero-white-panel {
        width: 45%;
        padding: var(--spacing-3xl);
        margin-left: -10%;
    }
}

@media (min-width: 1440px) {
    .hero-dark-panel {
        padding: var(--spacing-3xl) 6rem;
    }

    .hero-content {
        max-width: 700px;
    }
}

/* Gallery Section */
.gallery-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-50);
}

.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
}

@media (min-width: 768px) {
    .gallery-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.gallery-item {
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: transform var(--transition-normal);
}

.gallery-item:hover {
    transform: translateY(-8px);
}

/* Approach Section */
.approach-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-white);
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-title {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-gray-500);
    max-width: 600px;
    margin: 0 auto;
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding-left: 40px;
}

.timeline-line {
    position: absolute;
    left: 15px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(to bottom, var(--color-teal), var(--color-teal-dark));
}

.timeline-item {
    position: relative;
    padding-bottom: var(--spacing-2xl);
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -40px;
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--color-teal), var(--color-teal-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 0 0 4px var(--color-white), 0 0 0 6px var(--color-teal);
}

.timeline-number {
    color: var(--color-white);
    font-weight: 700;
    font-size: 0.875rem;
}

.timeline-content {
    background: var(--color-gray-50);
    padding: var(--spacing-lg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-left: var(--spacing-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.timeline-content:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

.timeline-content h3 {
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-xs);
}

.timeline-content p {
    color: var(--color-gray-500);
    font-size: 1rem;
}

@media (min-width: 768px) {
    .timeline {
        padding-left: 60px;
    }

    .timeline-line {
        left: 25px;
    }

    .timeline-marker {
        left: -60px;
        width: 48px;
        height: 48px;
    }

    .timeline-number {
        font-size: 1.125rem;
    }

    .timeline-content {
        padding: var(--spacing-xl);
    }
}

/* Contact Section */
.contact-section {
    padding: var(--spacing-3xl) 0;
    background: linear-gradient(135deg, var(--color-teal-dark) 0%, var(--color-teal) 100%);
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.contact-wrapper {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    position: relative;
    z-index: 1;
}

@media (min-width: 768px) {
    .contact-wrapper {
        grid-template-columns: 1fr 1fr;
        align-items: center;
    }
}

.contact-info h2 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.contact-info p {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--spacing-lg);
}

.contact-benefits {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.contact-benefits li {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    color: var(--color-white);
    font-weight: 500;
}

.check-icon {
    width: 24px;
    height: 24px;
    color: var(--color-white);
    flex-shrink: 0;
}

.contact-form {
    background: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 16px;
    box-shadow: var(--shadow-xl);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
}

@media (min-width: 480px) {
    .form-row {
        grid-template-columns: 1fr 1fr;
    }
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--color-charcoal);
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--color-gray-200);
    border-radius: 8px;
    font-family: var(--font-family);
    font-size: 1rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-teal);
    box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.2);
}

.form-group input::placeholder {
    color: var(--color-gray-400);
}

.contact-form .btn {
    width: 100%;
    padding: var(--spacing-md) var(--spacing-lg);
    font-size: 1.125rem;
}

/* Footer */
.footer {
    background: var(--color-charcoal);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr 1.5fr;
    }
}

.footer-brand .logo {
    margin-bottom: var(--spacing-md);
}

.footer-description {
    color: var(--color-gray-400);
    font-size: 0.9375rem;
    line-height: 1.7;
}

.footer-links h4,
.footer-contact h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-links ul {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.footer-links a {
    color: var(--color-gray-400);
    font-size: 0.9375rem;
    transition: color var(--transition-fast);
}

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

.footer-contact address {
    font-style: normal;
    color: var(--color-gray-400);
    font-size: 0.9375rem;
    line-height: 1.8;
}

.footer-contact a {
    color: var(--color-gray-400);
    transition: color var(--transition-fast);
}

.footer-contact a:hover {
    color: var(--color-teal);
}

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-charcoal-light);
    border-radius: 8px;
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-teal);
    color: var(--color-white);
    transform: translateY(-2px);
}

.social-links svg {
    width: 20px;
    height: 20px;
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-charcoal-lighter);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-gray-500);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-xs);
}

/* Utility Classes */
.text-center {
    text-align: center;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

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

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Focus States for Accessibility */
a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-teal);
    outline-offset: 2px;
}

/* Print Styles */
@media print {
    .header,
    .hero-parallax-bg,
    .contact-section,
    .footer {
        display: none;
    }

    body {
        font-size: 12pt;
        color: #000;
    }
}