/* ============================================
   BLUDDY BLUD - NIRD | Nuit de l'Info 2025
   Sharp, Professional, Angular Design System
   ============================================ */

/* CSS Variables */
:root {
    /* Colors - Sharp, Professional */
    --color-primary: #0a0a0a;
    --color-secondary: #1a1a1a;
    --color-accent: #dc2626;
    --color-accent-dark: #b91c1c;
    --color-text: #fafafa;
    --color-text-muted: #a3a3a3;
    --color-border: #262626;
    --color-surface: #141414;
    --color-surface-alt: #0f0f0f;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;

    /* Layout */
    --container-max: 1200px;
    --nav-height: 72px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-primary);
    color: var(--color-text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    list-style: none;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4.5rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: clamp(1.25rem, 2vw, 1.5rem); }

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

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

.nav__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav__logo {
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.nav__logo-accent {
    color: var(--color-accent);
}

.nav__menu {
    display: flex;
    gap: var(--space-xl);
}

.nav__link {
    font-size: 0.875rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: var(--space-sm) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav__link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-base);
}

.nav__link:hover {
    color: var(--color-accent);
}

.nav__link:hover::after {
    width: 100%;
}

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-sm);
}

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

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-height);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 50%;
    height: 100%;
    background: linear-gradient(135deg, var(--color-accent) 0%, transparent 60%);
    opacity: 0.03;
    pointer-events: none;
}

.hero__container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.hero__subtitle {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-lg);
}

.hero__title {
    margin-bottom: var(--space-xl);
}

.hero__title-accent {
    color: var(--color-accent);
}

.hero__description {
    font-size: 1.125rem;
    color: var(--color-text-muted);
    margin-bottom: var(--space-2xl);
    max-width: 500px;
}

.hero__description strong {
    color: var(--color-text);
    font-weight: 600;
}

.hero__cta {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

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

.hero__card {
    width: 280px;
    height: 280px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: var(--space-lg);
    position: relative;
}

.hero__card::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 20%;
    right: 20%;
    height: 2px;
    background: var(--color-accent);
}

.hero__card-icon {
    font-size: 4rem;
}

.hero__card-text {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.hero__date {
    position: absolute;
    bottom: var(--space-2xl);
    left: var(--space-lg);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.1em;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-md) var(--space-xl);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

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

.btn--outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text);
}

.btn--outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

/* Sections */
.section {
    padding: var(--space-4xl) 0;
}

.section--dark {
    background: var(--color-surface);
}

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

.section--stats {
    background: var(--color-accent);
    padding: var(--space-3xl) 0;
}

.section__header {
    text-align: center;
    margin-bottom: var(--space-3xl);
}

.section__tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--color-accent);
    margin-bottom: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    border: 1px solid var(--color-accent);
}

.section__title {
    margin-bottom: var(--space-md);
}

.section__intro {
    text-align: center;
    color: var(--color-text-muted);
    max-width: 600px;
    margin: 0 auto var(--space-3xl);
}

/* Grid */
.grid {
    display: grid;
    gap: var(--space-xl);
}

.grid--3 {
    grid-template-columns: repeat(3, 1fr);
}

/* Cards */
.card {
    background: var(--color-primary);
    border: 1px solid var(--color-border);
    padding: var(--space-xl);
    position: relative;
    transition: border-color var(--transition-base);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: var(--color-accent);
    transition: height var(--transition-base);
}

.card:hover {
    border-color: var(--color-accent);
}

.card:hover::before {
    height: 100%;
}

.card__icon {
    font-size: 2rem;
    margin-bottom: var(--space-lg);
}

.card__title {
    margin-bottom: var(--space-md);
}

.card__text {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

/* NIRD Grid */
.nird-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
    margin-bottom: var(--space-3xl);
}

.nird-item {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.nird-item__letter {
    font-size: 3rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
}

.nird-item__content h3 {
    margin-bottom: var(--space-sm);
}

.nird-item__content p {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

.nird-mission {
    text-align: center;
}

.quote {
    font-size: 1.25rem;
    font-style: italic;
    color: var(--color-text-muted);
    max-width: 700px;
    margin: 0 auto;
    padding: var(--space-xl);
    border-left: 4px solid var(--color-accent);
    text-align: left;
    background: var(--color-surface);
}

/* Solutions Grid */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-xl);
}

.solution-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    padding: var(--space-xl);
    transition: transform var(--transition-base), border-color var(--transition-base);
}

.solution-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-accent);
}

.solution-card__header {
    margin-bottom: var(--space-lg);
}

.solution-card__category {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-accent);
    padding: var(--space-xs) var(--space-sm);
    background: rgba(220, 38, 38, 0.1);
}

.solution-card__title {
    margin-bottom: var(--space-md);
}

.solution-card__text {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
    margin-bottom: var(--space-lg);
}

.solution-card__list {
    font-size: 0.875rem;
}

.solution-card__list li {
    padding: var(--space-xs) 0;
    padding-left: var(--space-lg);
    position: relative;
    color: var(--color-text-muted);
}

.solution-card__list li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 6px;
    height: 6px;
    background: var(--color-accent);
}

/* Steps */
.steps {
    max-width: 800px;
    margin: 0 auto var(--space-3xl);
}

.step {
    display: flex;
    gap: var(--space-xl);
    padding: var(--space-xl) 0;
    border-bottom: 1px solid var(--color-border);
}

.step:last-child {
    border-bottom: none;
}

.step__number {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--color-accent);
    line-height: 1;
    min-width: 80px;
}

.step__title {
    margin-bottom: var(--space-sm);
}

.step__text {
    color: var(--color-text-muted);
}

/* CTA Box */
.cta-box {
    text-align: center;
    padding: var(--space-3xl);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
}

.cta-box__title {
    margin-bottom: var(--space-md);
}

.cta-box__text {
    color: var(--color-text-muted);
    margin-bottom: var(--space-xl);
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

/* Stats */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    text-align: center;
}

.stat__number {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1;
}

.stat__suffix {
    font-size: 2rem;
    font-weight: 700;
}

.stat__label {
    display: block;
    margin-top: var(--space-sm);
    font-size: 0.875rem;
    opacity: 0.9;
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-lg);
}

.team-member {
    text-align: center;
    padding: var(--space-xl);
    background: var(--color-primary);
    border: 1px solid var(--color-border);
    transition: border-color var(--transition-base);
}

.team-member:hover {
    border-color: var(--color-accent);
}

.team-member__avatar {
    width: 80px;
    height: 80px;
    background: var(--color-surface);
    margin: 0 auto var(--space-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.team-member__name {
    font-size: 1rem;
    margin-bottom: var(--space-xs);
}

.team-member__role {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Footer */
.footer {
    background: var(--color-surface);
    border-top: 1px solid var(--color-border);
    padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__content {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--space-3xl);
}

.footer__logo {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: -0.03em;
}

.footer__logo-accent {
    color: var(--color-accent);
}

.footer__tagline {
    color: var(--color-text-muted);
    margin-top: var(--space-sm);
    font-size: 0.875rem;
}

.footer__links {
    display: flex;
    gap: var(--space-4xl);
}

.footer__col h4 {
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: var(--space-lg);
}

.footer__col ul li {
    margin-bottom: var(--space-sm);
}

.footer__col a {
    font-size: 0.9375rem;
    color: var(--color-text);
    transition: color var(--transition-fast);
}

.footer__col a:hover {
    color: var(--color-accent);
}

.footer__bottom {
    text-align: center;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--color-border);
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* Responsive */
@media (max-width: 1024px) {
    .hero__container {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero__description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero__cta {
        justify-content: center;
    }

    .hero__visual {
        display: none;
    }

    .grid--3 {
        grid-template-columns: 1fr;
    }

    .nird-grid {
        grid-template-columns: 1fr;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--space-2xl);
    }

    .team-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav__menu {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-primary);
        flex-direction: column;
        padding: var(--space-xl);
        gap: var(--space-md);
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }

    .nav__menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav__toggle {
        display: flex;
    }

    .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);
    }

    .step {
        flex-direction: column;
        gap: var(--space-md);
    }

    .footer__content {
        flex-direction: column;
        gap: var(--space-2xl);
    }

    .footer__links {
        flex-direction: column;
        gap: var(--space-xl);
    }

    .team-grid {
        grid-template-columns: 1fr;
    }
}

/* Animations */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-in {
    animation: fadeInUp 0.6s ease forwards;
}

/* Utility Classes */
.text-center { text-align: center; }
.text-accent { color: var(--color-accent); }
.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-md); }
.mb-2 { margin-bottom: var(--space-xl); }
.mb-3 { margin-bottom: var(--space-2xl); }