/* ============================================
   ARCO TOWERS - Modern Corporate Design
   Clean, Professional, Responsive
   ============================================ */

:root {
    --primary: #0f2744;
    --primary-light: #1a3d5c;
    --primary-dark: #091a2e;
    --accent: #d4a855;
    --accent-light: #e8c77a;
    --white: #ffffff;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --success: #10b981;
    --error: #ef4444;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Poppins', var(--font-main);
    --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --transition: 250ms ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); font-size: 1rem; line-height: 1.6; color: var(--gray-700); background: var(--white); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent); }
ul, ol { list-style: none; }

h1, h2, h3, h4, h5, h6 { font-family: var(--font-heading); font-weight: 600; line-height: 1.3; color: var(--gray-900); margin-bottom: 1rem; }
h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.75rem, 4vw, 2.5rem); }
h3 { font-size: clamp(1.5rem, 3vw, 2rem); }
h4 { font-size: 1.5rem; }

.container { width: 100%; max-width: 1280px; margin: 0 auto; padding: 0 1.5rem; }
.section { padding: 5rem 0; }
.section-header { text-align: center; max-width: 700px; margin: 0 auto 3rem; }
.section-header h2 { position: relative; display: inline-block; padding-bottom: 1rem; }
.section-header h2::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background: linear-gradient(90deg, var(--accent), var(--accent-light)); border-radius: 50px; }
.section-header p { color: var(--gray-500); font-size: 1.125rem; margin-top: 1rem; }
.grid { display: grid; gap: 2rem; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 1024px) { .grid-4, .grid-3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 768px) { .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; } }

/* Header */
.header { position: sticky; top: 0; z-index: 1000; background: var(--white); box-shadow: var(--shadow-sm); }
.header-top { background: var(--primary); color: rgba(255,255,255,0.9); padding: 0.5rem 0; font-size: 0.875rem; }
.header-top-content { display: flex; justify-content: space-between; align-items: center; }
.header-contact { display: flex; gap: 1.5rem; }
.header-contact a { color: rgba(255,255,255,0.9); display: flex; align-items: center; gap: 0.25rem; }
.header-contact a:hover { color: var(--accent); }
.lang-switch { display: flex; gap: 0.25rem; }
.lang-switch a { padding: 0.25rem 0.5rem; border-radius: var(--radius-sm); color: rgba(255,255,255,0.7); font-weight: 500; font-size: 0.75rem; text-transform: uppercase; transition: all var(--transition); }
.lang-switch a:hover, .lang-switch a.active { background: rgba(255,255,255,0.1); color: var(--white); }
.lang-switch a.active { background: var(--accent); color: var(--primary); }
.header-main { padding: 1rem 0; }
.header-content { display: flex; justify-content: space-between; align-items: center; }
.logo { display: flex; align-items: center; gap: 1rem; }
.logo img { height: 50px; width: auto; }
.logo-text { font-family: var(--font-heading); font-weight: 700; font-size: 1.5rem; color: var(--primary); line-height: 1.2; }
.logo-text span { display: block; font-size: 0.7rem; font-weight: 400; color: var(--gray-500); text-transform: uppercase; letter-spacing: 2px; }
.nav-main { display: flex; align-items: center; gap: 0.25rem; }
.nav-main a { padding: 0.5rem 1rem; color: var(--gray-700); font-weight: 500; font-size: 0.95rem; border-radius: var(--radius-md); transition: all var(--transition); position: relative; }
.nav-main a:hover, .nav-main a.active { color: var(--primary); background: var(--gray-50); }
.nav-main a.active::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 20px; height: 2px; background: var(--accent); border-radius: 50px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 0.5rem; }
.nav-toggle span { display: block; width: 24px; height: 2px; background: var(--primary); border-radius: 50px; transition: all var(--transition); }
.nav-mobile { position: fixed; top: 0; right: -100%; width: 300px; height: 100vh; background: var(--white); flex-direction: column; align-items: stretch; padding: 4rem 1.5rem; box-shadow: var(--shadow-xl); transition: right var(--transition); z-index: 1001; display: none !important; }
.nav-mobile.active { right: 0; }
.nav-mobile a { padding: 1rem; border-bottom: 1px solid var(--gray-100); display: block; }
@media (max-width: 992px) {
    .nav-toggle { display: flex; }
    .nav-desktop { display: none !important; }
    .nav-mobile { display: flex !important; }
    .header-contact { display: none; }
}

/* Hero */
.hero { position: relative; min-height: 600px; display: flex; align-items: center; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); overflow: hidden; }
.hero-slider { position: absolute; inset: 0; }
.hero-slide { position: absolute; inset: 0; opacity: 0; transition: opacity 1s ease; }
.hero-slide.active { opacity: 1; }
.hero-slide img { width: 100%; height: 100%; object-fit: cover; }
.hero-overlay { position: absolute; inset: 0; background: rgba(0, 0, 0, 0.3); }
.hero-content { position: relative; z-index: 10; text-align: center; color: var(--white); max-width: 800px; margin: 0 auto; padding: 2rem; }
.hero-content h1 { color: var(--white); font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 700; margin-bottom: 1.5rem; }
.hero-content p { font-size: 1.25rem; opacity: 0.9; margin-bottom: 2rem; max-width: 600px; margin-left: auto; margin-right: auto; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.hero-dots { position: absolute; bottom: 2rem; left: 50%; transform: translateX(-50%); display: flex; gap: 0.5rem; z-index: 10; }
.hero-dot { width: 12px; height: 12px; border-radius: 50%; background: rgba(255,255,255,0.3); cursor: pointer; transition: all var(--transition); border: 2px solid transparent; }
.hero-dot:hover { background: rgba(255,255,255,0.5); }
.hero-dot.active { background: var(--accent); border-color: var(--white); transform: scale(1.2); }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem; padding: 0.875rem 1.75rem; font-weight: 500; font-size: 0.95rem; border-radius: var(--radius-md); border: 2px solid transparent; cursor: pointer; transition: all var(--transition); }
.btn-primary { background: var(--primary); color: var(--white); border-color: var(--primary); }
.btn-primary:hover { background: var(--primary-light); border-color: var(--primary-light); color: var(--white); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-accent { background: var(--accent); color: var(--primary); border-color: var(--accent); }
.btn-accent:hover { background: var(--accent-light); border-color: var(--accent-light); transform: translateY(-2px); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: var(--white); }
.btn-white { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-white:hover { background: var(--gray-100); transform: translateY(-2px); }
.btn-outline-white { background: transparent; color: var(--white); border-color: rgba(255,255,255,0.5); }
.btn-outline-white:hover { background: var(--white); color: var(--primary); border-color: var(--white); }
.btn-sm { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg { padding: 1rem 2rem; font-size: 1rem; }

/* Cards */
.card { background: var(--white); border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); transition: all var(--transition); }
.card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }
.card-image { position: relative; height: 220px; overflow: hidden; }
.card-image img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.card:hover .card-image img { transform: scale(1.05); }
.card-body { padding: 1.5rem; }
.card-date { display: inline-flex; align-items: center; gap: 0.25rem; font-size: 0.85rem; color: var(--gray-500); margin-bottom: 0.5rem; }
.card-title { font-size: 1.25rem; margin-bottom: 0.5rem; }
.card-title a { color: var(--gray-900); }
.card-title a:hover { color: var(--primary); }
.card-text { color: var(--gray-600); font-size: 0.95rem; line-height: 1.7; margin-bottom: 1rem; }

/* Feature Cards */
.feature-card { text-align: center; padding: 2.5rem; background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-md); transition: all var(--transition); }
.feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-xl); }
.feature-icon { width: 80px; height: 80px; margin: 0 auto 1.5rem; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: var(--radius-lg); color: var(--white); font-size: 2rem; transition: all var(--transition); }
.feature-card:hover .feature-icon { transform: scale(1.1); background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%); }
.feature-card h3 { font-size: 1.25rem; margin-bottom: 0.5rem; }
.feature-card p { color: var(--gray-600); margin-bottom: 1.5rem; }

/* Documents */
.doc-categories { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 2rem; justify-content: center; }
.doc-category { padding: 0.5rem 1.5rem; background: var(--gray-100); color: var(--gray-700); border-radius: 50px; font-weight: 500; font-size: 0.9rem; transition: all var(--transition); }
.doc-category:hover, .doc-category.active { background: var(--primary); color: var(--white); }
.document-list { display: flex; flex-direction: column; gap: 1rem; }
.document-item { display: flex; align-items: center; gap: 1.5rem; padding: 1.5rem; background: var(--white); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); border: 1px solid var(--gray-100); transition: all var(--transition); }
.document-item:hover { box-shadow: var(--shadow-md); border-color: var(--gray-200); transform: translateX(5px); }
.document-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: var(--primary); border-radius: var(--radius-md); color: var(--white); font-size: 1.5rem; flex-shrink: 0; }
.document-icon.pdf { background: #dc2626; }
.document-icon.doc { background: #2563eb; }
.document-icon.xls { background: #16a34a; }
.document-info { flex: 1; min-width: 0; }
.document-title { font-weight: 600; color: var(--gray-900); margin-bottom: 0.25rem; }
.document-meta { display: flex; flex-wrap: wrap; gap: 1rem; font-size: 0.85rem; color: var(--gray-500); }
.document-download { display: flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1.5rem; background: var(--gray-100); color: var(--primary); border-radius: var(--radius-md); font-weight: 500; transition: all var(--transition); }
.document-download:hover { background: var(--primary); color: var(--white); }
@media (max-width: 768px) { .document-item { flex-direction: column; text-align: center; } .document-meta { justify-content: center; } }

/* Page Header */
.page-header { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); color: var(--white); padding: 4rem 0; text-align: center; position: relative; overflow: hidden; }
.page-header::before { content: ''; position: absolute; top: -50%; right: -20%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(212,168,85,0.1) 0%, transparent 70%); border-radius: 50%; }
.page-header h1 { color: var(--white); margin-bottom: 0.5rem; position: relative; }
.page-header p { color: rgba(255,255,255,0.8); font-size: 1.125rem; margin: 0; }
.breadcrumb { background: var(--gray-50); padding: 1rem 0; border-bottom: 1px solid var(--gray-100); }
.breadcrumb-list { display: flex; align-items: center; gap: 0.5rem; font-size: 0.9rem; }
.breadcrumb-list li { display: flex; align-items: center; gap: 0.5rem; }
.breadcrumb-list li::after { content: '/'; color: var(--gray-400); }
.breadcrumb-list li:last-child::after { display: none; }
.breadcrumb-list a { color: var(--gray-600); }
.breadcrumb-list a:hover { color: var(--primary); }
.breadcrumb-list li:last-child { color: var(--primary); font-weight: 500; }

/* Contact */
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 4rem; }
@media (max-width: 992px) { .contact-grid { grid-template-columns: 1fr; } }
.contact-info { display: flex; flex-direction: column; gap: 1.5rem; }
.contact-item { display: flex; gap: 1rem; }
.contact-icon { width: 56px; height: 56px; display: flex; align-items: center; justify-content: center; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); border-radius: var(--radius-lg); color: var(--white); font-size: 1.25rem; flex-shrink: 0; }
.contact-item h4 { font-size: 1rem; margin-bottom: 0.25rem; }
.contact-item p { color: var(--gray-600); margin: 0; }
.contact-form { background: var(--white); padding: 2.5rem; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

/* Forms */
.form-group { margin-bottom: 1.5rem; }
.form-label { display: block; font-weight: 500; color: var(--gray-700); margin-bottom: 0.5rem; }
.form-label .required { color: var(--error); }
.form-control { width: 100%; padding: 0.875rem 1rem; font-size: 1rem; color: var(--gray-800); background: var(--white); border: 2px solid var(--gray-200); border-radius: var(--radius-md); transition: all var(--transition); }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(15,39,68,0.1); }
.form-control::placeholder { color: var(--gray-400); }
textarea.form-control { min-height: 150px; resize: vertical; }

/* Footer */
.footer { background: var(--primary-dark); color: rgba(255,255,255,0.8); padding-top: 4rem; }
.footer-content { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; padding-bottom: 2.5rem; border-bottom: 1px solid rgba(255,255,255,0.1); }
@media (max-width: 992px) { .footer-content { grid-template-columns: 1fr 1fr; } }
@media (max-width: 576px) { .footer-content { grid-template-columns: 1fr; text-align: center; } }
.footer-brand { padding-right: 2rem; }
.footer-logo { font-family: var(--font-heading); font-size: 1.5rem; font-weight: 700; color: var(--white); margin-bottom: 1rem; }
.footer-brand p { font-size: 0.95rem; line-height: 1.7; }
.footer h4 { color: var(--white); font-size: 1rem; font-weight: 600; margin-bottom: 1.5rem; text-transform: uppercase; letter-spacing: 1px; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { color: rgba(255,255,255,0.7); transition: all var(--transition); font-size: 0.95rem; }
.footer-links a:hover { color: var(--accent); padding-left: 5px; }
.footer-bottom { padding: 1.5rem 0; text-align: center; font-size: 0.9rem; color: rgba(255,255,255,0.6); }

/* Alerts */
.alert { padding: 1rem 1.5rem; border-radius: var(--radius-md); margin-bottom: 1.5rem; display: flex; align-items: center; gap: 1rem; }
.alert-success { background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0; }
.alert-error { background: #fee2e2; color: #991b1b; border: 1px solid #fecaca; }
.alert-warning { background: #fef3c7; color: #92400e; border: 1px solid #fde68a; }

/* Pagination */
.pagination { display: flex; justify-content: center; gap: 0.25rem; margin-top: 2.5rem; }
.pagination a, .pagination span { display: flex; align-items: center; justify-content: center; min-width: 44px; height: 44px; padding: 0 1rem; background: var(--white); color: var(--gray-700); border: 1px solid var(--gray-200); border-radius: var(--radius-md); font-weight: 500; transition: all var(--transition); }
.pagination a:hover, .pagination .active { background: var(--primary); border-color: var(--primary); color: var(--white); }

/* Partners */
.partners-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 1.5rem; align-items: center; }
.partner-logo { display: flex; align-items: center; justify-content: center; padding: 1.5rem; background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--gray-100); transition: all var(--transition); }
.partner-logo:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.partner-logo img { max-height: 60px; filter: grayscale(100%); opacity: 0.6; transition: all var(--transition); }
.partner-logo:hover img { filter: grayscale(0%); opacity: 1; }

/* Utilities */
.bg-gray { background: var(--gray-50); }
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0; }
.mt-4 { margin-top: 2rem; }
.nav-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transition: all var(--transition); z-index: 1000; }
.nav-overlay.active { opacity: 1; visibility: visible; }