/* ===========================================
   ARCHITECTURE 2.0 WORKSHOP - STYLES
   =========================================== */

/* -------------------------------------------
   COLOR CONFIGURATION
   Change --color-primary to adjust the red shade
   ------------------------------------------- */
:root {
    /* PRIMARY COLOR - MODIFY THIS TO CHANGE THE RED SHADE */
    --color-primary: #972B34;           /* Main red - 151, 43, 52 */
    --color-primary-dark: #7F2239;      /* Darker shade - 127, 34, 57 */
    --color-primary-light: #FEE2E2;     /* Light shade for backgrounds */
    
    /* Base colors */
    --color-white: #FFFFFF;
    --color-black: #0F0F0F;
    --color-gray-50: #FAFAFA;
    --color-gray-100: #F5F5F5;
    --color-gray-200: #E5E5E5;
    --color-gray-300: #D4D4D4;
    --color-gray-500: #737373;
    --color-gray-700: #404040;
    --color-gray-900: #171717;
    
    /* Typography */
    --font-primary: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;
    --border-radius-lg: 16px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-900);
    background-color: var(--color-white);
}

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

a:hover {
    color: var(--color-primary-dark);
}

ul {
    list-style: none;
}

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

/* -------------------------------------------
   TYPOGRAPHY
   ------------------------------------------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-gray-900);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(1.75rem, 3vw, 2.5rem); }
h3 { font-size: 1.25rem; }

p {
    margin-bottom: var(--spacing-sm);
}

strong {
    font-weight: 600;
}

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

.section {
    padding: var(--spacing-3xl) 0;
}

.section-alt {
    background-color: var(--color-gray-50);
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background-color: var(--color-primary);
    margin: var(--spacing-sm) auto 0;
    border-radius: 2px;
}

/* -------------------------------------------
   NAVIGATION
   ------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-gray-200);
    z-index: 1000;
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-gray-900);
}

.nav-logo:hover {
    color: var(--color-primary);
}

.nav-links {
    display: flex;
    gap: var(--spacing-lg);
}

.nav-links a {
    color: var(--color-gray-700);
    font-weight: 500;
    font-size: 0.95rem;
}

.nav-links a:hover {
    color: var(--color-primary);
}

/* -------------------------------------------
   HERO
   ------------------------------------------- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-3xl) var(--spacing-md);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: 
        radial-gradient(ellipse at 30% 20%, var(--color-primary-light) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, var(--color-gray-100) 0%, transparent 50%),
        linear-gradient(180deg, var(--color-white) 0%, var(--color-gray-50) 100%);
    z-index: -1;
}

.hero-content {
    max-width: 800px;
}

.hero-date {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.hero-title {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: linear-gradient(135deg, var(--color-gray-900) 0%, var(--color-gray-700) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: clamp(1.1rem, 2.5vw, 1.5rem);
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
    font-weight: 400;
}

.hero-venue {
    font-size: 1.1rem;
    color: var(--color-gray-500);
}

.hero-venue .highlight {
    color: var(--color-primary);
    font-weight: 600;
}

/* -------------------------------------------
   ABOUT SECTION
   ------------------------------------------- */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.1rem;
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-md);
}

.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-xl);
}

.info-card {
    background: var(--color-white);
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    text-align: center;
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.info-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-sm);
}

.info-card h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-gray-500);
    margin-bottom: var(--spacing-xs);
}

.info-card p {
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 0;
}

/* -------------------------------------------
   COMPETITION SECTION
   ------------------------------------------- */
.competition-intro {
    max-width: 700px;
    margin: 0 auto var(--spacing-xl);
    text-align: center;
}

.competition-intro p {
    font-size: 1.15rem;
    color: var(--color-gray-700);
}

.competition-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.comp-card {
    background: var(--color-white);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--color-gray-200);
}

.comp-card h3 {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-gray-900);
}

.comp-card p {
    color: var(--color-gray-700);
    margin-bottom: 0;
}

.comp-card ul {
    color: var(--color-gray-700);
}

.comp-card li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
}

.comp-card li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.resource-link {
    display: inline-block;
    font-weight: 500;
    margin-bottom: var(--spacing-xs);
}

.coming-soon {
    font-size: 0.9rem;
    color: var(--color-gray-500);
    font-style: italic;
}

/* -------------------------------------------
   CALL FOR PAPERS SECTION
   ------------------------------------------- */
.cfp-content {
    max-width: 700px;
    margin: 0 auto;
}

.cfp-box {
    background: var(--color-white);
    border: 2px solid var(--color-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.cfp-box h3 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-md);
}

.cfp-box > p {
    color: var(--color-gray-700);
    margin-bottom: var(--spacing-lg);
}

.cfp-details {
    background: var(--color-gray-50);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.cfp-item {
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-gray-200);
}

.cfp-item:last-child {
    border-bottom: none;
}

.tbd {
    color: var(--color-gray-500);
    font-style: italic;
}

/* -------------------------------------------
   BUTTONS
   ------------------------------------------- */
.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background-color: var(--color-primary);
    color: var(--color-white);
}

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

/* -------------------------------------------
   TEAM SECTION
   ------------------------------------------- */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.team-member {
    text-align: center;
}

.member-photo {
    width: 160px;
    height: 160px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    overflow: hidden;
    background: var(--color-gray-200);
    border: 4px solid var(--color-white);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
}

.member-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.member-name {
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xs);
}

.member-affiliation {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    margin-bottom: 0;
}

.member-role {
    font-size: 0.85rem;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: 0;
}

/* -------------------------------------------
   FOOTER
   ------------------------------------------- */
.footer {
    background: var(--color-gray-900);
    color: var(--color-white);
    padding: var(--spacing-xl) 0;
    text-align: center;
}

.footer p {
    margin-bottom: var(--spacing-xs);
}

.footer-sub {
    color: var(--color-gray-500);
    font-size: 0.9rem;
}

/* -------------------------------------------
   RESPONSIVE
   ------------------------------------------- */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-sm);
    }
    
    .nav-links a {
        font-size: 0.85rem;
    }
    
    .section {
        padding: var(--spacing-2xl) 0;
    }
    
    .hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: var(--spacing-2xl);
    }
    
    .info-cards {
        grid-template-columns: 1fr;
    }
    
    .competition-grid {
        grid-template-columns: 1fr;
    }
    
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .nav-container {
        flex-direction: column;
        gap: var(--spacing-sm);
    }
    
    .team-grid {
        grid-template-columns: 1fr;
    }
}