/* 
AIML@TU Brand Guidelines CSS
Official brand colors and typography for consistent club materials
*/

:root {
    /* AIML@TU Brand Colors (University of Tulsa Themed) */
    --tu-navy: #043865;
    --tu-gold: #ddb774;
    --tu-light-gold: #f4e8d8;
    --tu-dark-navy: #021a33;
    --white: #ffffff;
    --gray: #f8f9fa;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

/* Base Typography */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--tu-navy);
    overflow-x: hidden;
}

/* Headings */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family);
    color: var(--tu-navy);
    margin-bottom: 1rem;
}

h1 { 
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    letter-spacing: -2px;
}

h2 { 
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
}

h3 { 
    font-size: 1.5rem; 
    font-weight: 700;
}

/* Utility Classes for Colors */
.text-navy { color: var(--tu-navy) !important; }
.text-gold { color: var(--tu-gold) !important; }
.text-light-gold { color: var(--tu-light-gold) !important; }
.text-dark-navy { color: var(--tu-dark-navy) !important; }
.text-white { color: var(--white) !important; }
.text-gray { color: var(--gray) !important; }

.bg-navy { background-color: var(--tu-navy) !important; }
.bg-gold { background-color: var(--tu-gold) !important; }
.bg-light-gold { background-color: var(--tu-light-gold) !important; }
.bg-dark-navy { background-color: var(--tu-dark-navy) !important; }
.bg-white { background-color: var(--white) !important; }
.bg-gray { background-color: var(--gray) !important; }

/* Gradient Backgrounds */
.bg-navy-gradient {
    background: linear-gradient(135deg, var(--tu-navy), var(--tu-dark-navy));
}

.bg-gold-gradient {
    background: linear-gradient(135deg, var(--tu-gold), var(--tu-light-gold));
}

/* Navigation Styles */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--tu-navy);
    backdrop-filter: blur(10px);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 64px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--white);
    text-decoration: none;
}

.nav-logo img {
    width: 32px;
    height: 40px;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 30px;
    align-items: center;
}

.nav-link {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--tu-gold);
}

.nav-cta {
    background: var(--tu-gold);
    color: var(--tu-navy);
    padding: 8px 20px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255, 255, 255, 0.2);
}

/* Button Styles */
.btn-primary {
    background: var(--tu-gold);
    color: var(--tu-navy);
    border: 2px solid var(--tu-gold);
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    display: inline-block;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-primary:hover {
    background: var(--white);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(221, 183, 116, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
    padding: 15px 40px;
    font-size: 1.1rem;
    font-weight: 600;
    text-decoration: none;
    border-radius: 50px;
    display: inline-block;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--tu-navy);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(255, 255, 255, 0.2);
}

.nav-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 2px solid rgba(221, 183, 116, 0.3);
    color: rgba(221, 183, 116, 0.8);
    padding: 12px 24px;
    font-size: 1rem;
    border-radius: 30px;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
    font-weight: 600;
}

.nav-btn:hover:not(:disabled) {
    background: var(--tu-gold);
    color: var(--tu-navy);
    transform: translateY(-2px);
}

.nav-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Card Components */
.feature-card {
    background: var(--white);
    border: 2px solid var(--tu-gold);
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(4, 56, 101, 0.15);
}

.slide-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 30px;
    border-radius: 20px;
    border: 1px solid rgba(221, 183, 116, 0.2);
    margin-bottom: 25px;
}

.event-highlight {
    max-width: 1000px;
    margin: 0 auto;
    background: var(--white);
    border-radius: 30px;
    overflow: hidden;
    box-shadow: 0 30px 60px rgba(4, 56, 101, 0.1);
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
}

.announcement-card {
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(221, 183, 116, 0.2);
    border-radius: 18px;
    padding: 28px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* Event Components */
.event-badge {
    display: inline-block;
    background: var(--tu-gold);
    color: var(--tu-navy);
    padding: 8px 20px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.event-title {
    font-size: 2.5rem;
    color: var(--tu-navy);
    margin-bottom: 20px;
    font-weight: 800;
}

.event-info {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-bottom: 30px;
}

.event-info-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: #666;
}

.event-info-icon {
    color: var(--tu-gold);
    font-size: 1.2rem;
    width: 20px;
    height: 20px;
}

/* Contact Cards */
.contact-card {
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
    transition: all 0.3s ease;
}

.contact-card:hover {
    background: rgba(221, 183, 116, 0.2);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2rem;
    color: var(--tu-gold);
    margin-bottom: 15px;
    display: flex;
    justify-content: center;
    align-items: center;
    height: 40px;
}

.contact-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--tu-gold);
}

.contact-label {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.contact-value {
    color: var(--white);
    font-weight: 600;
    text-decoration: none;
}

/* Section Styling */
.section-title {
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--tu-navy);
    text-align: center;
    margin-bottom: 60px;
    position: relative;
}

.section-title::after {
    content: "";
    position: absolute;
    bottom: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--tu-gold);
    border-radius: 2px;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 900;
    color: var(--white);
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.3);
    letter-spacing: -2px;
}

.hero-subtitle {
    font-size: clamp(1.2rem, 3vw, 1.8rem);
    color: var(--tu-gold);
    margin-bottom: 30px;
    font-weight: 300;
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* Slideshow Styles */
.slideshow-container {
    height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.slide {
    display: none;
    width: 100%;
    height: 100%;
    padding: 60px;
    animation: fadeIn 0.5s;
    overflow-y: auto;
}

.slide.active {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    padding-top: 60px;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.slide-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: 20px;
    color: var(--white);
}

.slide-subtitle {
    font-size: 1.5rem;
    color: var(--tu-gold);
    font-weight: 300;
}

/* Progress Bar */
.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
}

.progress {
    width: 0;
    height: 100%;
    background: linear-gradient(135deg, var(--tu-gold), var(--white));
    transition: width 0.3s ease;
}

/* Icon Filters */
.icon-navy-filter {
    filter: brightness(0) saturate(100%) invert(13%) sepia(80%) saturate(1532%) hue-rotate(200deg) brightness(94%) contrast(98%);
}

/* Form Elements */
.form-control {
    font-family: var(--font-family);
    border: 2px solid var(--tu-light-gold);
    border-radius: 6px;
    padding: 12px;
    color: var(--tu-navy);
    background-color: var(--white);
    transition: border-color 0.2s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--tu-gold);
    box-shadow: 0 0 0 3px rgba(221, 183, 116, 0.1);
}

.form-label {
    font-weight: 600;
    color: var(--tu-navy);
    margin-bottom: 8px;
    display: block;
}

/* Responsive Design */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    .event-highlight {
        grid-template-columns: 1fr;
    }
    
    .slide {
        padding: 40px 20px;
    }
    
    .slide-title {
        font-size: 2.4rem;
    }
    
    .btn-primary, .btn-secondary { 
        width: 100%; 
        margin-bottom: 10px; 
    }
}

/* Mobile Menu Styles */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.hamburger-line {
    width: 100%;
    height: 3px;
    background-color: var(--white);
    transition: all 0.3s;
    border-radius: 2px;
}

.mobile-menu-btn.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

.mobile-menu-btn.active .hamburger-line:nth-child(2) {
    opacity: 0;
}

.mobile-menu-btn.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: flex;
    }
}