/* ==========================================================================
   OWASP AppSec Days Portugal 2026 - Stylesheet
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables / Design Tokens
   -------------------------------------------------------------------------- */
:root {
    /* Primary colors from event branding */
    --color-primary: #5BA4E5;
    --color-primary-dark: #3d8bd4;
    --color-accent: #7C5CFF;
    --color-accent-light: #a991ff;

    /* Dark theme colors */
    --color-dark-bg: #0d1421;
    --color-dark-surface: #1a2332;
    --color-dark-card: #1e2a3d;

    /* Light theme colors */
    --color-light-bg: #f5f7fa;
    --color-light-surface: #ffffff;
    --color-light-card: #ffffff;

    /* Text colors */
    --color-text-light: #ffffff;
    --color-text-light-muted: rgba(255, 255, 255, 0.7);
    --color-text-dark: #1a2332;
    --color-text-dark-muted: #5a6a7a;

    /* Tier colors */
    --color-diamond: #b9f2ff;
    --color-platinum: #e5e4e2;
    --color-gold: #ffd700;
    --color-silver: #c0c0c0;

    /* Gradients */
    --gradient-hero: linear-gradient(135deg, #0d1421 0%, #1a3a5c 25%, #2d5a7b 50%, #5a3d7a 75%, #1a2332 100%);
    --gradient-cta: linear-gradient(135deg, #1a3a5c 0%, #5a3d7a 100%);

    /* Typography */
    --font-family: 'Lato', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;

    /* Container */
    --container-max: 1200px;
    --container-padding: 1.5rem;
}

/* --------------------------------------------------------------------------
   Base Styles / Reset
   -------------------------------------------------------------------------- */
*, *::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-text-dark);
    background-color: var(--color-light-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
    list-style: none;
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

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

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

h4 {
    font-size: 1.25rem;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

@media (min-width: 768px) {
    .section {
        padding: 6rem 0;
    }
}

.section-light {
    background-color: var(--color-light-bg);
    color: var(--color-text-dark);
}

.section-dark {
    background-color: var(--color-dark-bg);
    color: var(--color-text-light);
}

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

.section-subtitle {
    text-align: center;
    color: var(--color-text-dark-muted);
    max-width: 600px;
    margin: 0 auto var(--spacing-2xl);
}

.section-dark .section-subtitle {
    color: var(--color-text-light-muted);
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 700;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    white-space: nowrap;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

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

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

.btn-secondary {
    background: var(--color-accent);
    color: var(--color-text-light);
}

.btn-secondary:hover {
    background: var(--color-accent-light);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid currentColor;
    color: var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-text-light);
}

.section-dark .btn-outline {
    color: var(--color-text-light);
    border-color: var(--color-text-light);
}

.section-dark .btn-outline:hover {
    background: var(--color-text-light);
    color: var(--color-dark-bg);
}

/* --------------------------------------------------------------------------
   Icons
   -------------------------------------------------------------------------- */
.icon {
    width: 1.25em;
    height: 1.25em;
    flex-shrink: 0;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: transparent;
    padding: var(--spacing-md) 0;
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    background: rgba(13, 20, 33, 0.95);
    backdrop-filter: blur(10px);
    padding: var(--spacing-sm) 0;
    box-shadow: var(--shadow-lg);
}

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

.nav-logo img {
    height: 50px;
    width: auto;
}

.navbar.scrolled .nav-logo img {
    height: 40px;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-menu a:not(.btn) {
    color: var(--color-text-light);
    font-weight: 500;
    padding: var(--spacing-sm) 0;
    position: relative;
}

.nav-menu a:not(.btn)::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: width var(--transition-normal);
}

.nav-menu a:not(.btn):hover::after {
    width: 100%;
}

.nav-cta {
    margin-left: var(--spacing-md);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--spacing-sm);
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--color-text-light);
    transition: all var(--transition-fast);
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--color-text-light);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    background: rgba(255, 255, 255, 0.1);
}

.lang-option {
    padding: 2px 6px;
    border-radius: 3px;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.lang-option.active {
    background: var(--color-primary);
}

.lang-option:hover:not(.active) {
    background: rgba(255, 255, 255, 0.2);
}

.lang-separator {
    opacity: 0.5;
}

/* Mobile Navigation */
@media (max-width: 991px) {
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 80%;
        max-width: 400px;
        height: 100vh;
        background: var(--color-dark-bg);
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        padding: 6rem var(--spacing-xl) var(--spacing-xl);
        gap: var(--spacing-md);
        transition: right var(--transition-normal);
        box-shadow: var(--shadow-xl);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-menu a:not(.btn) {
        font-size: 1.25rem;
    }

    .nav-cta {
        margin-left: 0;
        margin-top: var(--spacing-lg);
    }

    .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);
    }
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
    padding: 8rem var(--container-padding) 4rem;
}

.hero-background {
    position: absolute;
    inset: 0;
    background: var(--gradient-hero);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
}

.hero-background::before {
    content: '';
    position: absolute;
    inset: 0;
    background: url('../assets/background.png') center center / cover no-repeat;
    opacity: 0.3;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 900px;
    color: var(--color-text-light);
}

.hero-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.15);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xl);
    backdrop-filter: blur(4px);
}

.hero-logo {
    margin-bottom: var(--spacing-lg);
}

.hero-logo img {
    max-width: 100%;
    width: auto;
    height: auto;
    max-height: 200px;
    margin: 0 auto;
}

@media (min-width: 768px) {
    .hero-logo img {
        max-height: 280px;
    }
}

.hero-details {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.hero-detail {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.125rem;
}

.hero-detail .icon {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--color-primary);
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-text-light-muted);
    max-width: 700px;
    margin: 0 auto var(--spacing-2xl);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
}

.hero-scroll {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1;
}

.hero-scroll a {
    display: block;
    animation: bounce 2s infinite;
}

.hero-scroll svg {
    width: 2rem;
    height: 2rem;
    color: var(--color-text-light-muted);
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% { transform: translateY(0); }
    40% { transform: translateY(-10px); }
    60% { transform: translateY(-5px); }
}

/* --------------------------------------------------------------------------
   Program Section
   -------------------------------------------------------------------------- */
.program-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

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

.program-day {
    background: var(--color-light-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.program-day-header {
    background: var(--color-dark-surface);
    color: var(--color-text-light);
    padding: var(--spacing-lg);
}

.program-day-label {
    display: inline-block;
    background: var(--color-primary);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.program-day-header h3 {
    margin-bottom: var(--spacing-xs);
}

.program-day-type {
    font-size: 0.875rem;
    color: var(--color-text-light-muted);
}

.program-items {
    padding: var(--spacing-lg);
}

.program-items li {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    background: var(--color-light-bg);
    margin-bottom: var(--spacing-sm);
}

.program-items li:last-child {
    margin-bottom: 0;
}

.program-items .icon {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--color-primary);
}

.program-item-highlight {
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent)) !important;
    color: var(--color-text-light);
}

.program-item-highlight .icon {
    color: var(--color-text-light);
}

.program-day-main .program-day-header {
    background: var(--gradient-cta);
}

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

.program-note {
    margin-top: var(--spacing-md);
    color: var(--color-text-dark-muted);
}

/* Schedule */
.schedule-container {
    background: var(--color-light-surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
}

.schedule-container h3 {
    margin-bottom: var(--spacing-sm);
}

.schedule-note {
    color: var(--color-text-dark-muted);
    margin-bottom: var(--spacing-lg);
}

.schedule-placeholder {
    background: var(--color-light-bg);
    border-radius: var(--radius-md);
    padding: var(--spacing-3xl);
    border: 2px dashed var(--color-primary);
}

.schedule-placeholder-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-dark-muted);
}

.schedule-placeholder-content svg {
    width: 3rem;
    height: 3rem;
    opacity: 0.5;
}

/* --------------------------------------------------------------------------
   Speakers Section
   -------------------------------------------------------------------------- */
.speakers-highlight {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.keynote-badge {
    display: inline-block;
    background: var(--color-accent);
    color: var(--color-text-light);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: 50px;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
}

.speakers-note {
    color: var(--color-text-light-muted);
}

.speakers-grid {
    display: grid;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-2xl);
}

@media (min-width: 600px) {
    .speakers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .speakers-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.speaker-card {
    background: var(--color-dark-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    text-align: center;
    transition: transform var(--transition-normal);
}

.speaker-card:hover {
    transform: translateY(-5px);
}

.speaker-image {
    aspect-ratio: 1;
    background: var(--color-dark-card);
    display: flex;
    align-items: center;
    justify-content: center;
}

.speaker-image svg {
    width: 50%;
    height: 50%;
    color: var(--color-text-light-muted);
    opacity: 0.3;
}

.speaker-info {
    padding: var(--spacing-lg);
}

.speaker-info h4 {
    margin-bottom: var(--spacing-xs);
}

.speaker-info p {
    color: var(--color-text-light-muted);
    font-size: 0.875rem;
}

.speaker-card-placeholder {
    border: 2px dashed rgba(255, 255, 255, 0.2);
    background: transparent;
}

.speakers-cta {
    text-align: center;
}

/* --------------------------------------------------------------------------
   CFP Section
   -------------------------------------------------------------------------- */
.cfp-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.cfp-info p {
    color: var(--color-text-light-muted);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-2xl);
}

.cfp-topics {
    background: var(--color-dark-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-2xl);
}

.cfp-topics h3 {
    color: var(--color-primary);
    margin-bottom: var(--spacing-lg);
    font-size: 1.25rem;
}

.cfp-topics ul {
    display: grid;
    gap: var(--spacing-sm);
    text-align: left;
}

@media (min-width: 600px) {
    .cfp-topics ul {
        grid-template-columns: repeat(2, 1fr);
    }
}

.cfp-topics li {
    padding: var(--spacing-sm) var(--spacing-md);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    color: var(--color-text-light-muted);
}

.cfp-cta {
    text-align: center;
}

.cfp-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.cfp-buttons .btn {
    min-width: 220px;
}

.cfp-deadline {
    margin-top: var(--spacing-md);
    color: var(--color-text-light-muted);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Sponsorship Section
   -------------------------------------------------------------------------- */
.sponsor-benefits {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

@media (min-width: 600px) {
    .sponsor-benefits {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .sponsor-benefits {
        grid-template-columns: repeat(4, 1fr);
    }
}

.benefit-card {
    background: var(--color-light-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.benefit-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.benefit-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.benefit-icon svg {
    width: 30px;
    height: 30px;
    color: var(--color-text-light);
}

.benefit-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-text-dark);
}

.benefit-card p {
    color: var(--color-text-dark-muted);
    font-size: 0.9rem;
}

/* Sponsor Tiers */
.sponsor-tiers {
    margin-bottom: var(--spacing-3xl);
}

.sponsor-tiers h3 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.tiers-grid {
    display: grid;
    gap: var(--spacing-lg);
}

@media (min-width: 600px) {
    .tiers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1000px) {
    .tiers-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.tier-card {
    background: var(--color-light-surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal);
}

.tier-card:hover {
    transform: translateY(-5px);
}

.tier-header {
    padding: var(--spacing-lg);
    text-align: center;
    color: var(--color-text-light);
}

.tier-diamond .tier-header {
    background: linear-gradient(135deg, #1a4a6e, #5a8aaa, #b9f2ff);
}

.tier-platinum .tier-header {
    background: linear-gradient(135deg, #4a4a4a, #8a8a8a, #c0c0c0);
}

.tier-gold .tier-header {
    background: linear-gradient(135deg, #8a6a0a, #c9a227, #ffd700);
}

.tier-silver .tier-header {
    background: linear-gradient(135deg, #5a5a5a, #8a8a8a, #a0a0a0);
}

.tier-name {
    display: block;
    font-size: 1.5rem;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.tier-slots {
    font-size: 0.875rem;
    opacity: 0.9;
}

.tier-price {
    font-size: 2.5rem;
    font-weight: 900;
    text-align: center;
    padding: var(--spacing-lg);
    color: var(--color-text-dark);
}

.tier-benefits {
    padding: 0 var(--spacing-lg) var(--spacing-lg);
}

.tier-benefits li {
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-light-bg);
    font-size: 0.9rem;
    color: var(--color-text-dark-muted);
}

.tier-benefits li:last-child {
    border-bottom: none;
}

/* À la Carte */
.sponsor-alacarte {
    margin-bottom: var(--spacing-2xl);
}

.sponsor-alacarte h3 {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.alacarte-grid {
    display: grid;
    gap: var(--spacing-md);
}

@media (min-width: 600px) {
    .alacarte-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 900px) {
    .alacarte-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

.alacarte-item {
    background: var(--color-light-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.alacarte-name {
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.alacarte-price {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-primary);
}

.sponsor-cta {
    text-align: center;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-3xl);
}

/* Current Sponsors */
.current-sponsors {
    text-align: center;
    padding-top: var(--spacing-2xl);
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.current-sponsors > h3 {
    margin-bottom: var(--spacing-xl);
}

.sponsor-tier {
    margin-bottom: var(--spacing-2xl);
}

.sponsor-tier:last-child {
    margin-bottom: 0;
}

.sponsor-tier-label {
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-xs) var(--spacing-lg);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.sponsor-tier-diamond .sponsor-tier-label {
    background: linear-gradient(135deg, #1a4a6e, #5a8aaa, #b9f2ff);
    color: var(--color-text-light);
}

.sponsor-tier-platinum .sponsor-tier-label {
    background: linear-gradient(135deg, #4a4a4a, #8a8a8a, #c0c0c0);
    color: var(--color-text-light);
}

.sponsor-tier-gold .sponsor-tier-label {
    background: linear-gradient(135deg, #8a6a0a, #c9a227, #ffd700);
    color: var(--color-text-dark);
}

.sponsor-tier-silver .sponsor-tier-label {
    background: linear-gradient(135deg, #5a5a5a, #8a8a8a, #a0a0a0);
    color: var(--color-text-light);
}

.sponsor-logos {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-lg);
}

.sponsor-logo-placeholder {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-light-surface);
    border: 2px dashed rgba(0, 0, 0, 0.15);
    border-radius: var(--radius-md);
    color: var(--color-text-dark-muted);
    font-size: 0.75rem;
    transition: all var(--transition-normal);
}

.sponsor-logo-placeholder:hover {
    border-color: var(--color-primary);
    background: rgba(91, 164, 229, 0.05);
}

/* Diamond - Largest */
.sponsor-logo-diamond {
    width: 280px;
    height: 140px;
    font-size: 0.875rem;
}

/* Platinum - Large */
.sponsor-logo-platinum {
    width: 220px;
    height: 110px;
    font-size: 0.8rem;
}

/* Gold - Medium */
.sponsor-logo-gold {
    width: 180px;
    height: 90px;
}

/* Silver - Small */
.sponsor-logo-silver {
    width: 140px;
    height: 70px;
    font-size: 0.7rem;
}

@media (max-width: 600px) {
    .sponsor-logo-diamond {
        width: 100%;
        max-width: 280px;
        height: 120px;
    }

    .sponsor-logo-platinum {
        width: 100%;
        max-width: 200px;
        height: 100px;
    }

    .sponsor-logo-gold {
        width: calc(50% - var(--spacing-sm));
        max-width: 160px;
        height: 80px;
    }

    .sponsor-logo-silver {
        width: calc(50% - var(--spacing-sm));
        max-width: 120px;
        height: 60px;
    }
}

/* --------------------------------------------------------------------------
   Venue Section
   -------------------------------------------------------------------------- */
.venue-content {
    display: grid;
    gap: var(--spacing-xl);
}

@media (min-width: 900px) {
    .venue-content {
        grid-template-columns: 1fr 1fr;
    }
}

.venue-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.venue-card {
    background: var(--color-dark-surface);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
}

.venue-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.venue-name {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
}

.venue-address {
    color: var(--color-text-light-muted);
    margin-bottom: var(--spacing-md);
}

.venue-note {
    color: var(--color-text-light-muted);
    font-size: 0.9rem;
}

.travel-tips li {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.travel-tips li:last-child {
    margin-bottom: 0;
}

.travel-tips .icon {
    width: 1.5rem;
    height: 1.5rem;
    color: var(--color-primary);
    flex-shrink: 0;
    margin-top: 2px;
}

.travel-tips strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.travel-tips span {
    color: var(--color-text-light-muted);
    font-size: 0.9rem;
}

.venue-map {
    display: flex;
    align-items: center;
    justify-content: center;
}

.map-placeholder {
    width: 100%;
    aspect-ratio: 4/3;
    background: var(--color-dark-surface);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    color: var(--color-text-light-muted);
    border: 2px dashed rgba(255, 255, 255, 0.2);
}

.map-placeholder svg {
    width: 4rem;
    height: 4rem;
    opacity: 0.5;
}

.venue-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.venue-image img {
    width: 100%;
    height: auto;
    border-radius: var(--radius-lg);
    object-fit: cover;
    max-height: 400px;
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about-content {
    display: grid;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-3xl);
}

@media (min-width: 768px) {
    .about-content {
        grid-template-columns: 1fr 1fr;
    }
}

.about-owasp h3,
.about-event h3 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.about-owasp p,
.about-event p {
    color: var(--color-text-dark-muted);
    margin-bottom: var(--spacing-lg);
}

.owasp-activities li {
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text-dark-muted);
}

.owasp-activities li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
}

.event-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

.highlight {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-light-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.highlight-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
}

.highlight-label {
    font-size: 0.875rem;
    color: var(--color-text-dark-muted);
}

/* Organizing Committee */
.organizing-committee {
    text-align: center;
}

.organizing-committee h3 {
    margin-bottom: var(--spacing-sm);
}

.committee-intro {
    color: var(--color-text-dark-muted);
    margin-bottom: var(--spacing-xl);
}

.committee-grid {
    display: grid;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
}

@media (min-width: 600px) {
    .committee-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 900px) {
    .committee-grid {
        grid-template-columns: repeat(5, 1fr);
    }
}

.committee-member {
    background: var(--color-light-surface);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.committee-member h4 {
    margin-bottom: var(--spacing-xs);
}

.committee-member p {
    color: var(--color-text-dark-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.member-linkedin {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    color: #0077b5;
    transition: all var(--transition-fast);
}

.member-linkedin:hover {
    color: #005582;
    transform: scale(1.1);
}

.member-linkedin svg {
    width: 20px;
    height: 20px;
}

.committee-member-advisor {
    border: 2px solid var(--color-accent);
}

.committee-member-advisor p {
    color: var(--color-accent);
    font-weight: 600;
}

.volunteers-note {
    color: var(--color-accent);
    font-weight: 600;
}

.volunteers-cta {
    margin-top: var(--spacing-lg);
}

/* --------------------------------------------------------------------------
   CTA Section
   -------------------------------------------------------------------------- */
.section-cta {
    background: var(--gradient-cta);
    color: var(--color-text-light);
    text-align: center;
    padding: var(--spacing-3xl) 0;
}

.section-cta h2 {
    margin-bottom: var(--spacing-md);
}

.section-cta > .container > p {
    color: var(--color-text-light-muted);
    margin-bottom: var(--spacing-xl);
}

.register-buttons {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.register-note {
    color: var(--color-text-light-muted);
    font-size: 0.9rem;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-dark-bg);
    color: var(--color-text-light);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
}

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

.footer-logo {
    height: 60px;
    width: auto;
    margin-bottom: var(--spacing-md);
}

.footer-brand p {
    color: var(--color-text-light-muted);
}

.footer-links {
    display: grid;
    gap: var(--spacing-xl);
}

@media (min-width: 600px) {
    .footer-links {
        grid-template-columns: repeat(3, 1fr);
    }
}

.footer-column h4 {
    margin-bottom: var(--spacing-md);
    color: var(--color-primary);
}

.footer-column ul li {
    margin-bottom: var(--spacing-sm);
}

.footer-column a {
    color: var(--color-text-light-muted);
    transition: color var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-text-light);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    text-align: center;
}

.footer-bottom p {
    color: var(--color-text-light-muted);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
}

.footer-bottom p:last-child {
    margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Utilities
   -------------------------------------------------------------------------- */
.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;
}

/* Mobile adjustments */
@media (max-width: 600px) {
    .event-highlights {
        grid-template-columns: repeat(2, 1fr);
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-detail {
        font-size: 1rem;
    }
}