:root {
    /* ISTAE Brand Colors */
    --primary-blue: #0A192F;
    --secondary-blue: #112240;
    --accent-red: #C8102E;
    --accent-red-hover: #A00D25;
    
    /* Neutrals */
    --light-bg: #F8FAFC;
    --white: #FFFFFF;
    --text-main: #334155;
    --text-muted: #64748B;
    --border-color: #E2E8F0;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.2);
    --glass-shadow: 0 8px 32px 0 rgba(10, 25, 47, 0.05);
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--light-bg);
    color: var(--text-main);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    color: var(--primary-blue);
}

/* Navbar (Glassmorphism) */
.navbar-custom {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--glass-shadow);
    padding: 1rem 0;
    transition: all 0.3s ease;
}

.navbar-custom .navbar-brand {
    font-weight: 800;
    color: var(--primary-blue);
    font-size: 1.5rem;
    letter-spacing: -0.5px;
}

.navbar-custom .navbar-brand span {
    color: var(--accent-red);
}

.navbar-custom .nav-link {
    font-weight: 500;
    color: var(--text-main);
    transition: color 0.2s ease;
    padding: 0.5rem 1rem;
    border-radius: 6px;
}

.navbar-custom .nav-link:hover {
    color: var(--accent-red);
    background-color: rgba(200, 16, 46, 0.05);
}

/* Buttons */
.btn-primary-custom {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: var(--white);
    border: none;
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(10, 25, 47, 0.15);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-primary-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(10, 25, 47, 0.25);
    color: var(--white);
}

.btn-accent-custom {
    background: linear-gradient(135deg, var(--accent-red), var(--accent-red-hover));
    color: var(--white);
    border: none;
    font-weight: 600;
    padding: 0.6rem 1.5rem;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(200, 16, 46, 0.2);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.btn-accent-custom:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(200, 16, 46, 0.3);
    color: var(--white);
}

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 6rem 0;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(200,16,46,0.15) 0%, rgba(200,16,46,0) 70%);
    border-radius: 50%;
    z-index: 1;
}

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

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--white);
}

.hero-subtitle {
    font-size: 1.25rem;
    font-weight: 400;
    opacity: 0.85;
    margin-bottom: 2rem;
}

/* Search Bar (Hero) */
.search-box-wrapper {
    background: var(--white);
    padding: 0.5rem;
    border-radius: 12px;
    display: flex;
    box-shadow: 0 10px 25px rgba(0,0,0,0.2);
    max-width: 700px;
}

.search-box-wrapper input {
    border: none;
    box-shadow: none;
    font-size: 1.1rem;
    padding: 0.75rem 1rem;
    border-radius: 8px;
}

.search-box-wrapper input:focus {
    box-shadow: none;
    outline: none;
}

.search-box-wrapper button {
    border-radius: 8px;
    padding: 0.75rem 2rem;
}

/* Cards (Glassmorphism & Hover) */
.card-custom {
    background: var(--white);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    height: 100%;
}

.card-custom:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 24px -5px rgba(0, 0, 0, 0.1);
    border-color: rgba(10, 25, 47, 0.1);
}

.card-icon-wrapper {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
}

.bg-blue-light {
    background-color: rgba(10, 25, 47, 0.05);
    color: var(--primary-blue);
}

.bg-red-light {
    background-color: rgba(200, 16, 46, 0.05);
    color: var(--accent-red);
}

/* Auth Cards */
.auth-wrapper {
    min-height: calc(100vh - 76px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 0;
    background: linear-gradient(135deg, var(--light-bg) 0%, #E2E8F0 100%);
}

.auth-card {
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.auth-header {
    background: var(--primary-blue);
    color: var(--white);
    padding: 2rem;
    text-align: center;
}

.auth-body {
    padding: 2.5rem;
}

.form-control-custom {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
    background-color: #F8FAFC;
}

.form-control-custom:focus {
    background-color: var(--white);
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(10, 25, 47, 0.1);
}

/* Footer */
footer {
    margin-top: auto;
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 3rem 0 1.5rem;
    font-size: 0.9rem;
}

footer a {
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: color 0.2s ease;
}

footer a:hover {
    color: var(--white);
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease forwards;
}

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }