/* ========================================
   Computational Data Science Portfolio
   Bold. Technical. Data-Driven.
   ======================================== */

:root {
    /* Data Science Color Palette */
    --color-navy: #0A1628;
    --color-dark-blue: #0D2847;
    --color-blue: #1E3A8A;
    --color-electric: #00D9FF;
    --color-cyan: #06B6D4;
    --color-mint: #00FF88;
    --color-teal: #14B8A6;
    --color-purple: #8B5CF6;
    --color-slate: #1E293B;
    --color-slate-light: #334155;
    --color-gray: #64748B;
    --color-light: #F8FAFC;

    /* Typography - Terminal/Programming focused */
    --font-heading: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    --font-body: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', 'Cascadia Code', 'Consolas', monospace;
}

/* ========================================
   Base Styles
   ======================================== */

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========================================
   Computational Hero Section
   ======================================== */

.computational-hero {
    min-height: 100vh;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 4rem 2rem;
    overflow: hidden;
}

/* Hero Background */
.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg,
        var(--color-navy) 0%,
        var(--color-dark-blue) 50%,
        var(--color-slate) 100%);
    z-index: 0;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle,
        rgba(0, 217, 255, 0.15) 0%,
        rgba(0, 217, 255, 0) 70%);
    border-radius: 50%;
    animation: pulse 8s ease-in-out infinite;
}

.hero-background::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle,
        rgba(0, 255, 136, 0.12) 0%,
        rgba(0, 255, 136, 0) 70%);
    border-radius: 50%;
    animation: pulse 10s ease-in-out infinite reverse;
}

/* Grid Overlay */
.grid-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(100, 116, 139, 0.1) 1px, transparent 1px),
        linear-gradient(90deg, rgba(100, 116, 139, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.3;
}

/* Floating Mathematical Symbols */
.floating-symbols {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
}

.symbol {
    position: absolute;
    font-family: Georgia, serif;
    font-size: 3rem;
    font-weight: 700;
    color: rgba(0, 217, 255, 0.3);
    left: var(--x);
    top: var(--y);
    animation: float 30s ease-in-out infinite;
    animation-delay: var(--delay);
    pointer-events: none;
}

.symbol.code {
    font-family: var(--font-mono);
    font-size: 2rem;
    color: rgba(0, 255, 136, 0.35);
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0;
    }
    25% {
        transform: translate(30px, -30px) rotate(5deg);
        opacity: 0.6;
    }
    50% {
        transform: translate(-20px, -50px) rotate(-3deg);
        opacity: 1;
    }
    75% {
        transform: translate(40px, -20px) rotate(7deg);
        opacity: 0.6;
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.6;
        transform: scale(1.1);
    }
}

/* Hero Content */
.hero-content {
    max-width: 900px;
    position: relative;
    z-index: 10;
    text-align: center;
    animation: fadeInUp 1s ease-out;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.25rem;
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: 50px;
    color: var(--color-electric);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.hero-badge svg {
    stroke: var(--color-electric);
}

/* Hero Title */
.hero-title {
    font-family: var(--font-heading);
    margin: 0 0 1.5rem 0;
}

.name-line {
    display: block;
    font-size: clamp(3rem, 8vw, 6rem);
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, #FFFFFF 0%, var(--color-electric) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

.role-line {
    display: block;
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
    color: var(--color-mint);
    line-height: 1.2;
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

/* Hero Description */
.hero-description {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: rgba(248, 250, 252, 0.8);
    line-height: 1.6;
    max-width: 700px;
    margin: 0 auto 3rem auto;
    animation: fadeInUp 1s ease-out 0.5s backwards;
}

/* Hero Stats */
.hero-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 3rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    animation: fadeInUp 1s ease-out 0.6s backwards;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-family: var(--font-mono);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-electric);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: rgba(248, 250, 252, 0.6);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

.education-stat svg {
    stroke: var(--color-electric);
}

.stat-divider {
    width: 1px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
}

/* Hero CTA */
.hero-cta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
    animation: fadeInUp 1s ease-out 0.7s backwards;
}

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    text-decoration: none;
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-electric) 0%, var(--color-cyan) 100%);
    color: var(--color-navy);
    border: 2px solid transparent;
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 40px rgba(0, 217, 255, 0.3);
    gap: 1rem;
}

.btn-secondary {
    background: transparent;
    color: var(--color-light);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.4);
    transform: translateY(-3px);
}

/* ========================================
   Data Visualization Card
   ======================================== */

.data-viz-card {
    position: absolute;
    bottom: 2rem;
    right: 2rem;
    width: 320px;
    background: rgba(10, 22, 40, 0.8);
    backdrop-filter: blur(20px);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: 16px;
    padding: 1.5rem;
    z-index: 20;
    animation: slideInRight 1s ease-out 0.8s backwards;
}

.viz-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.viz-title {
    font-family: var(--font-heading);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-light);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.viz-indicator {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--color-mint);
}

.indicator-dot {
    width: 8px;
    height: 8px;
    background: var(--color-mint);
    border-radius: 50%;
    animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.3; }
}

.viz-chart {
    position: relative;
    height: 120px;
    padding: 1rem 0;
}

.line-chart {
    width: 100%;
    height: 100%;
}

.chart-line {
    stroke-dasharray: 800;
    stroke-dashoffset: 800;
    animation: drawLine 2s ease-out 1.5s forwards;
}

@keyframes drawLine {
    to {
        stroke-dashoffset: 0;
    }
}

.viz-dots {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
}

.viz-dot {
    position: absolute;
    width: 8px;
    height: 8px;
    background: var(--color-electric);
    border: 2px solid var(--color-navy);
    border-radius: 50%;
    opacity: 0;
    animation: fadeIn 0.5s ease-out 2s forwards;
}

/* ========================================
   Journey/Timeline Section
   ======================================== */

.journey-section {
    padding: 6rem 0;
    background: var(--color-slate);
    position: relative;
}

.journey-timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 3rem;
}

.journey-timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(
        to bottom,
        var(--color-mint) 0%,
        var(--color-mint) 25%,
        var(--color-electric) 50%,
        var(--color-cyan) 75%,
        var(--color-purple) 100%
    );
    border-radius: 3px;
}

.timeline-item {
    position: relative;
    padding-bottom: 3rem;
}

.timeline-item:last-child {
    padding-bottom: 0;
}

.timeline-marker {
    position: absolute;
    left: -3rem;
    top: 0;
    width: 40px;
    height: 40px;
    background: var(--color-slate);
    border: 3px solid var(--color-mint);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transform: translateX(-50%);
    margin-left: 1.5px;
}

.timeline-item.completed .timeline-marker {
    background: var(--color-mint);
}

.timeline-item.completed .timeline-marker svg {
    stroke: var(--color-navy);
}

.timeline-item.current .timeline-marker {
    border-color: var(--color-electric);
    background: var(--color-slate);
}

.timeline-item.current .timeline-marker svg {
    stroke: var(--color-electric);
}

.timeline-item.current .timeline-marker.pulse {
    animation: timelinePulse 2s ease-in-out infinite;
}

@keyframes timelinePulse {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.4);
    }
    50% {
        box-shadow: 0 0 0 12px rgba(0, 217, 255, 0);
    }
}

.timeline-item.future .timeline-marker {
    border-color: var(--color-purple);
    background: transparent;
    border-style: dashed;
}

.timeline-item.future .timeline-marker svg {
    stroke: var(--color-purple);
}

.timeline-content {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    padding: 1.5rem 2rem;
    transition: all 0.3s ease;
}

.timeline-item:hover .timeline-content {
    background: rgba(255, 255, 255, 0.06);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateX(8px);
}

.timeline-years {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-electric);
    background: rgba(0, 217, 255, 0.1);
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.timeline-item.current .timeline-years {
    background: rgba(0, 217, 255, 0.2);
}

.timeline-item.future .timeline-years {
    color: var(--color-purple);
    background: rgba(139, 92, 246, 0.1);
}

.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-light);
    margin: 0 0 0.5rem 0;
}

.timeline-content p {
    font-size: 1rem;
    color: rgba(248, 250, 252, 0.7);
    line-height: 1.6;
    margin: 0;
}

/* ========================================
   Capabilities Section
   ======================================== */

.capabilities-section {
    padding: 6rem 0;
    background: var(--color-navy);
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 800px;
    margin: 0 auto 4rem auto;
}

.section-header h2 {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 800;
    color: var(--color-light);
    margin: 0 0 1rem 0;
    line-height: 1.1;
}

.section-header p {
    font-size: 1.125rem;
    color: rgba(248, 250, 252, 0.7);
    margin: 0;
}

/* Capabilities Grid */
.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
    margin-bottom: 3rem;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.capability-card {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 2rem;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.capability-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color) 0%, transparent 100%);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.capability-card:hover {
    transform: translateY(-8px);
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--accent-color);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.capability-card:hover::before {
    opacity: 1;
}

.card-stats {
    --accent-color: var(--color-electric);
}

.card-ml {
    --accent-color: var(--color-mint);
}

.card-data {
    --accent-color: var(--color-purple);
}

.card-viz {
    --accent-color: var(--color-cyan);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 16px;
    transition: all 0.4s ease;
}

.capability-card:hover .card-icon {
    background: var(--accent-color);
    transform: rotate(-5deg) scale(1.1);
}

.card-icon svg {
    stroke: var(--accent-color);
    transition: stroke 0.4s ease;
}

.capability-card:hover .card-icon svg {
    stroke: var(--color-navy);
}

.card-header h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-light);
    margin: 0;
}

.capability-card p {
    font-size: 1rem;
    color: rgba(248, 250, 252, 0.7);
    line-height: 1.6;
    margin: 0 0 1.5rem 0;
    flex: 1;
}

/* Card Tags */
.card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.4rem 0.8rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 6px;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-light);
    transition: all 0.3s ease;
    line-height: 1;
}

.capability-card:hover .tag {
    background: rgba(255, 255, 255, 0.15);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.tag.tag-learning {
    background: rgba(139, 92, 246, 0.2);
    border-color: var(--color-purple);
    color: var(--color-purple);
}

.capability-card:hover .tag.tag-learning {
    background: rgba(139, 92, 246, 0.3);
}

/* Section Footer */
.section-footer {
    text-align: center;
}

.link-explore {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    font-family: var(--font-heading);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--color-electric);
    text-decoration: none;
    padding: 1rem 2rem;
    background: rgba(0, 217, 255, 0.1);
    border: 2px solid rgba(0, 217, 255, 0.3);
    border-radius: 12px;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.link-explore:hover {
    background: rgba(0, 217, 255, 0.2);
    border-color: var(--color-electric);
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 217, 255, 0.2);
    gap: 1rem;
}

/* ========================================
   Quick Links Section
   ======================================== */

.quick-links {
    padding: 4rem 0 6rem 0;
    background: var(--color-navy);
}

.links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.link-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 16px;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
}

.link-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--color-electric);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.link-card:hover::before {
    transform: scaleY(1);
}

.link-card:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(0, 217, 255, 0.4);
    transform: translateX(8px);
}

.link-icon {
    flex-shrink: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 56px;
    height: 56px;
    background: rgba(0, 217, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.link-card:hover .link-icon {
    background: var(--color-electric);
    transform: rotate(-5deg);
}

.link-icon svg {
    stroke: var(--color-electric);
    transition: stroke 0.3s ease;
}

.link-card:hover .link-icon svg {
    stroke: var(--color-navy);
}

.link-content {
    flex: 1;
}

.link-content h3 {
    font-family: var(--font-heading);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-light);
    margin: 0 0 0.25rem 0;
}

.link-content p {
    font-size: 0.875rem;
    color: rgba(248, 250, 252, 0.6);
    margin: 0;
}

.link-arrow {
    flex-shrink: 0;
    stroke: rgba(248, 250, 252, 0.4);
    transition: all 0.3s ease;
}

.link-card:hover .link-arrow {
    stroke: var(--color-electric);
    transform: translateX(5px);
}

/* ========================================
   Animations
   ======================================== */

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

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

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ========================================
   Responsive Design
   ======================================== */

@media (max-width: 1024px) {
    .data-viz-card {
        position: relative;
        bottom: auto;
        right: auto;
        width: 100%;
        max-width: 400px;
        margin: 3rem auto 0 auto;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1.5rem;
    }

    .stat-divider {
        width: 80%;
        height: 1px;
    }
}

@media (max-width: 768px) {
    .computational-hero {
        padding: 3rem 1rem;
    }

    .container {
        padding: 0 1rem;
    }

    .hero-stats {
        padding: 1.5rem;
    }

    .stat-value {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        width: 100%;
    }

    .btn-primary,
    .btn-secondary {
        width: 100%;
        justify-content: center;
    }

    .capabilities-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        max-width: 100%;
    }

    .capabilities-section,
    .journey-section {
        padding: 4rem 0;
    }

    .section-header {
        margin-bottom: 3rem;
    }

    .symbol {
        font-size: 2rem;
    }

    .journey-timeline {
        padding-left: 2.5rem;
    }

    .timeline-marker {
        width: 32px;
        height: 32px;
        left: -2.5rem;
    }

    .timeline-marker svg {
        width: 16px;
        height: 16px;
    }

    .timeline-content {
        padding: 1.25rem 1.5rem;
    }

    .timeline-content h3 {
        font-size: 1.25rem;
    }
}

@media (max-width: 480px) {
    .hero-badge {
        font-size: 0.75rem;
        padding: 0.4rem 1rem;
    }

    .name-line {
        font-size: 2.5rem;
    }

    .role-line {
        font-size: 1.25rem;
    }

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

    .link-card {
        flex-direction: column;
        align-items: flex-start;
    }

    .link-arrow {
        align-self: flex-end;
    }
}