/* ============================================
   PLUSMARCAS LANDING PAGE - PREMIUM DESIGN
   ============================================ */

/* CSS Custom Properties - Design System */
:root {
    /* Color Palette */
    --color-black: #0a0a0a;
    --color-dark: #121212;
    --color-slate-900: #1a1a1a;
    --color-slate-800: #2a2a2a;
    --color-slate-700: #3a3a3a;
    --color-slate-600: #4a4a4a;
    --color-slate-400: #8a8a8a;
    --color-slate-300: #b0b0b0;
    --color-white: #ffffff;

    /* Accent Colors */
    --color-electric-blue: #3b82f6;
    --color-electric-blue-dark: #2563eb;
    --color-neon-green: #10b981;
    --color-glow-blue: rgba(59, 130, 246, 0.3);

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-weight-light: 300;
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    --font-weight-extrabold: 800;

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

    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 1.5rem;
    --radius-xl: 2rem;

    /* Transitions */
    --transition-fast: 0.2s ease-out;
    --transition-normal: 0.4s ease-out;
    --transition-slow: 0.6s ease-out;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px var(--color-glow-blue);
}

/* ============================================
   BASE STYLES
   ============================================ */

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

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

body {
    font-family: var(--font-family);
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   HEADER
   ============================================ */

.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding: var(--spacing-md) 0;
}

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

.logo {
    height: 80px;
    width: auto;
    transition: transform var(--transition-normal);
    filter: brightness(0) invert(1);
}

.logo:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .logo {
        height: 60px;
    }
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

/* ============================================
   GLASSMORPHISM CARD COMPONENT
   ============================================ */

.glass-card {
    background: rgba(26, 26, 26, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-md);
}

.glass-card:hover {
    transform: translateY(-4px);
    border-color: rgba(59, 130, 246, 0.3);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    letter-spacing: -0.02em;
}

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

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

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

h4 {
    font-size: 1.25rem;
}

p {
    font-size: 1.125rem;
    line-height: 1.7;
    color: var(--color-slate-300);
}

/* ============================================
   BUTTONS & CTAs
   ============================================ */

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 1rem 2rem;
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

.cta-button.primary {
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-electric-blue-dark));
    color: var(--color-white);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
}

.cta-button.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(59, 130, 246, 0.6);
}

.cta-button.secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--color-electric-blue);
    color: var(--color-white);
}

.cta-button.secondary:hover {
    background: rgba(59, 130, 246, 0.1);
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.3);
}

.cta-button.large {
    padding: 1.25rem 2.5rem;
    font-size: 1.25rem;
}

.cta-button .arrow {
    transition: transform var(--transition-fast);
}

.cta-button:hover .arrow {
    transform: translateX(4px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: calc(var(--spacing-3xl) + 70px) 0 var(--spacing-3xl) 0;
}

.hero-gradient {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 50% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.hero-headline {
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--color-white), var(--color-slate-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-headline .highlight {
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-neon-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subheadline {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-2xl);
    color: var(--color-slate-300);
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   SECTION HEADERS
   ============================================ */

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

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title {
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-electric-blue);
    font-weight: var(--font-weight-medium);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ============================================
   PHILOSOPHY SECTION
   ============================================ */

.philosophy-section {
    background: linear-gradient(180deg, var(--color-black) 0%, var(--color-dark) 100%);
}

.philosophy-quote {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.quote-text {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    font-weight: var(--font-weight-semibold);
    font-style: italic;
    color: var(--color-electric-blue);
    max-width: 800px;
    margin: 0 auto;
}

.philosophy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-2xl);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

.philosophy-grid h3 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.comparison-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.comparison-column {
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    border: 2px solid;
}

.comparison-column.bad {
    background: rgba(239, 68, 68, 0.05);
    border-color: rgba(239, 68, 68, 0.3);
}

.comparison-column.good {
    background: rgba(16, 185, 129, 0.05);
    border-color: rgba(16, 185, 129, 0.3);
}

.comparison-column h4 {
    margin-bottom: var(--spacing-md);
    font-size: 1.25rem;
}

.comparison-column ul {
    list-style: none;
}

.comparison-column li {
    padding: var(--spacing-xs) 0;
    color: var(--color-slate-300);
}

/* Value Proposition Card */
.value-proposition {
    margin: var(--spacing-2xl) 0;
}

.value-card {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    border-color: rgba(59, 130, 246, 0.3);
}

.value-card h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.value-card p {
    font-size: 1.125rem;
    line-height: 1.7;
}

/* ============================================
   PROBLEMS SECTION
   ============================================ */

.problems-section {
    background: var(--color-black);
}

.pillars-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.pillar-card {
    position: relative;
}

.pillar-number {
    font-size: 3rem;
    font-weight: var(--font-weight-extrabold);
    color: var(--color-electric-blue);
    opacity: 0.2;
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
    line-height: 1;
}

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

.pillar-question {
    font-weight: var(--font-weight-semibold);
    color: var(--color-electric-blue);
    margin-bottom: var(--spacing-sm);
}

.enemies-section {
    margin-top: var(--spacing-3xl);
}

.enemies-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-white);
}

.enemies-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.enemy-card {
    background: rgba(239, 68, 68, 0.05);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    transition: all var(--transition-normal);
}

.enemy-card:hover {
    transform: translateY(-4px);
    border-color: rgba(239, 68, 68, 0.4);
}

.enemy-icon {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
}

.enemy-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.enemy-card p {
    font-size: 0.95rem;
}

/* ============================================
   METHODOLOGY SECTION
   ============================================ */

.methodology-section {
    background: linear-gradient(180deg, var(--color-black) 0%, var(--color-dark) 100%);
}

.methodology-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-3xl);
}

.method-card {
    text-align: center;
}

.method-icon {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
}

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

.method-card p {
    margin-bottom: var(--spacing-md);
}

.method-tag {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(59, 130, 246, 0.1);
    border: 1px solid rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-electric-blue);
}

/* ============================================
   TECH CATEGORIES (INTERACTIVE TABS)
   ============================================ */

.tech-categories {
    margin-top: var(--spacing-2xl);
}

.tech-category {
    margin-bottom: var(--spacing-lg);
}

.category-button {
    width: 100%;
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    background: rgba(26, 26, 26, 0.6);
    backdrop-filter: blur(20px);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    color: var(--color-slate-300);
    font-size: 1.125rem;
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    transition: all var(--transition-normal);
    text-align: left;
}

.category-button:hover {
    border-color: rgba(59, 130, 246, 0.4);
    background: rgba(26, 26, 26, 0.8);
    transform: translateX(4px);
}

.category-button.active {
    border-color: var(--color-electric-blue);
    background: rgba(59, 130, 246, 0.1);
    color: var(--color-white);
}

.category-icon {
    font-size: 1.75rem;
}

.category-name {
    flex: 1;
}

.category-content {
    display: none;
    padding: var(--spacing-xl);
    margin-top: var(--spacing-md);
    background: rgba(26, 26, 26, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-lg);
}

.category-content.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-content h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
}

.category-description {
    color: var(--color-slate-400);
    margin-bottom: var(--spacing-lg);
    font-size: 1rem;
}

/* Support Features Grid */
.support-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.support-item {
    padding: var(--spacing-lg);
    background: rgba(16, 185, 129, 0.05);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.support-item:hover {
    border-color: rgba(16, 185, 129, 0.4);
    transform: translateY(-2px);
}

.support-item h4 {
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.support-item p {
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ============================================
   CASE STUDY SECTION
   ============================================ */

.case-study-section {
    background: var(--color-black);
}

.case-study-card {
    max-width: 900px;
    margin: 0 auto;
}

.case-study-header {
    margin-bottom: var(--spacing-xl);
}

.case-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: linear-gradient(135deg, var(--color-electric-blue), var(--color-neon-green));
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-semibold);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--spacing-md);
}

.case-study-header h3 {
    color: var(--color-white);
}

.case-study-content {
    display: grid;
    gap: var(--spacing-xl);
}

.case-section h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--color-white);
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.tech-tag {
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.3);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: var(--font-weight-medium);
    color: var(--color-neon-green);
}

/* ============================================
   FOOTER SECTION
   ============================================ */

.footer-section {
    background: linear-gradient(180deg, var(--color-dark) 0%, var(--color-black) 100%);
    padding: var(--spacing-3xl) 0 var(--spacing-xl) 0;
}

.footer-content {
    text-align: center;
}

.footer-headline {
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-white), var(--color-slate-300));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    justify-content: center;
    align-items: center;
    margin-bottom: var(--spacing-xl);
}

.footer-links {
    margin-top: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.footer-link {
    color: var(--color-slate-400);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-electric-blue);
}

.footer-bottom {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-slate-800);
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-slate-600);
}

/* ============================================
   ANIMATIONS
   ============================================ */

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays */
.fade-in:nth-child(1) {
    transition-delay: 0.1s;
}

.fade-in:nth-child(2) {
    transition-delay: 0.2s;
}

.fade-in:nth-child(3) {
    transition-delay: 0.3s;
}

.fade-in:nth-child(4) {
    transition-delay: 0.4s;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 768px) {
    html {
        font-size: 14px;
    }

    section {
        padding: var(--spacing-2xl) 0;
    }

    .glass-card {
        padding: var(--spacing-lg);
    }

    .pillars-grid,
    .methodology-grid,
    .enemies-grid,
    .philosophy-grid {
        grid-template-columns: 1fr;
    }

    .comparison-table {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .cta-button {
        width: 100%;
        justify-content: center;
    }
}