/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Space Grotesk', 'Inter', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: #374151;
    background-color: #f8fafc;
}

/* CSS Variables - Design System */
:root {
    --color-emerald-50: #ecfdf5;
    --color-emerald-300: #6ee7b7;
    --color-emerald-600: #059669;
    --color-emerald-700: #047857;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-900: #111827;
    --color-white: #ffffff;
    --color-slate-50: #f8fafc;

    --transition-all: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius: 0.375rem;
    --border-radius-md: 0.5rem;
}

/* Main Container */
.main-container {
    min-height: 100vh;
    background-color: var(--color-slate-50);
}

/* Hero Section */
.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: #000000;
    padding: 0 1.5rem;
    position: relative;
    overflow: hidden;
}

/* Hero Video Background */
.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: opacity 0.7s ease;
}

.hero-video.fading {
    opacity: 0.6;
}

/* Hero Overlay */
.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(0, 0, 0, 0.5) 0%,
        rgba(0, 0, 0, 0.3) 50%,
        rgba(0, 0, 0, 0.6) 100%
    );
    z-index: 1;
}

.hero-content {
    text-align: center;
    max-width: 48rem;
    margin: 0 auto;
    padding: 8rem 0;
    position: relative;
    z-index: 10;
}

.back-link {
    display: inline-block;
    margin-bottom: 3rem;
    font-size: 0.875rem;
    color: var(--color-gray-500);
    text-decoration: none;
    transition: var(--transition-all);
}

.back-link:hover {
    color: var(--color-emerald-600);
}

.hero-title {
    font-size: 3.75rem;
    font-weight: 700;
    margin-bottom: 2.5rem;
    color: var(--color-white);
    letter-spacing: -0.025em;
    line-height: 1.1;
}

@media (min-width: 768px) {
    .hero-title {
        font-size: 4.5rem;
    }
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 600;
    line-height: 1.4;
}

@media (min-width: 768px) {
    .hero-subtitle {
        font-size: 1.5rem;
    }
}

.hero-description {
    font-size: 1.125rem;
    margin-bottom: 4rem;
    color: rgba(255, 255, 255, 0.8);
    font-weight: 400;
    max-width: 30rem;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.5;
}

@media (min-width: 768px) {
    .hero-description {
        font-size: 1.25rem;
    }
}

.author-link {
    color: var(--color-emerald-300);
    text-decoration: underline;
    font-weight: 500;
    transition: var(--transition-all);
}

.author-link:hover {
    color: var(--color-emerald-700);
}

.hero-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    justify-content: center;
}

@media (min-width: 640px) {
    .hero-actions {
        flex-direction: row;
    }
}

/* Button Styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    white-space: nowrap;
    border-radius: var(--border-radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition-all);
    cursor: pointer;
    text-decoration: none;
    border: none;
    font-family: inherit;
}

.btn:focus-visible {
    outline: 2px solid var(--color-emerald-600);
    outline-offset: 2px;
}

.btn:disabled {
    pointer-events: none;
    opacity: 0.5;
}

.btn-outline {
    border: 1px solid var(--color-emerald-600);
    background-color: transparent;
    color: var(--color-emerald-600);
}

.btn-outline:hover {
    background-color: var(--color-emerald-600);
    color: var(--color-white);
}

.btn-sm {
    height: 2.25rem;
    padding: 0 0.75rem;
    border-radius: var(--border-radius-md);
}

.btn:not(.btn-sm) {
    height: 2.75rem;
    padding: 0 2.5rem 0 2.5rem;
    font-weight: 500;
}

@media (min-width: 1024px) {
    .btn:not(.btn-sm) {
        padding: 1.5rem 2.5rem;
    }
}

.btn-icon {
    height: 1rem;
    width: 1rem;
    stroke-width: 2;
}

/* Container */
.container {
    max-width: 64rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Section Styles */
.about-section {
    padding: 8rem 0;
    background-color: var(--color-white);
}

.tools-section {
    padding: 8rem 0;
    background-color: var(--color-gray-50);
    transition: background-color 0.7s ease;
}

.tools-section.darker {
    background-color: var(--color-gray-200);
}

.section-header {
    text-align: center;
    margin-bottom: 6rem;
}

.section-title {
    font-size: 2.25rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--color-gray-900);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .section-title {
        font-size: 3rem;
    }
}

.section-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 40rem;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.5;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .skills-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

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

.skill-icon {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.icon {
    height: 2.5rem;
    width: 2.5rem;
    color: var(--color-emerald-600);
    stroke-width: 1.5;
}

.skill-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    color: var(--color-gray-900);
}

.skill-description {
    color: var(--color-gray-600);
    line-height: 1.5;
    font-weight: 400;
    font-size: 1rem;
}

/* Tools List */
.tools-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.tool-item {
    border: 1px solid var(--color-gray-200);
    padding: 2.5rem;
    background-color: var(--color-white);
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.tool-icon {
    flex-shrink: 0;
}

.tool-content {
    flex: 1;
}

.tool-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.tool-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-gray-900);
}

.tool-status {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    border: 1px solid var(--color-emerald-300);
    color: var(--color-emerald-700);
    background-color: var(--color-emerald-50);
    font-weight: 400;
    border-radius: var(--border-radius);
}

.tool-description {
    color: var(--color-gray-600);
    margin-bottom: 1.5rem;
    font-weight: 400;
    line-height: 1.5;
    font-size: 1rem;
}

.tool-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.tech-tag {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    background-color: var(--color-gray-100);
    padding: 0.25rem 0.75rem;
    font-weight: 400;
    border-radius: var(--border-radius);
}

.tool-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

@media (min-width: 640px) {
    .tool-actions {
        flex-direction: row;
    }
}

.tool-actions a {
    text-decoration: none;
}

/* Footer */
.footer-section {
    padding: 3rem 0;
    background-color: var(--color-white);
    border-top: 1px solid var(--color-gray-200);
}

.footer-content {
    max-width: 64rem;
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}

.footer-text {
    color: var(--color-gray-600);
    font-weight: 500;
}

.footer-section .author-link {
    color: var(--color-emerald-700);
}

.footer-section .author-link:hover {
    color: var(--color-emerald-300);
}

/* Responsive Design */
@media (max-width: 768px) {
    .tool-item {
        flex-direction: column;
        text-align: center;
        gap: 1.5rem;
    }

    .tool-header {
        justify-content: center;
    }

    .tool-actions {
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 200px;
    }
}

/* Smooth scrolling */
html {
    scroll-behavior: smooth;
}

/* Focus styles for accessibility */
button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-emerald-600);
    outline-offset: 2px;
}

/* Animation for page load */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-container {
    animation: fadeInUp 0.6s ease-out;
}

/* Mobile Styles - Hide tool icons on mobile devices */
@media (max-width: 768px) {
    .tool-icon {
        display: none;
    }

    .tool-header {
        justify-content: flex-start !important;
        text-align: left;
    }

    .tool-description {
        text-align: left;
    }

    .tool-actions {
        align-items: flex-start !important;
    }
}

/* ========================================
   PORTFOLIO PAGE STYLES
   ======================================== */

/* Breadcrumb Navigation */
.breadcrumb {
    margin-bottom: 3rem;
}

.breadcrumb-list {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    list-style: none;
    flex-wrap: wrap;
}

.breadcrumb-item {
    font-size: 0.875rem;
}

.breadcrumb-link {
    color: var(--color-gray-500);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-all);
}

.breadcrumb-link:hover {
    color: var(--color-emerald-600);
}

.breadcrumb-separator {
    color: var(--color-gray-500);
    user-select: none;
}

.breadcrumb-current {
    color: var(--color-gray-900);
    font-weight: 500;
}

/* Portfolio Container */
.portfolio-container {
    max-width: 64rem;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Portfolio Hero Section */
.portfolio-hero-section {
    padding: 8rem 0;
    background-color: var(--color-white);
}

.portfolio-hero-title {
    font-size: 3rem;
    font-weight: 600;
    color: var(--color-gray-900);
    line-height: 1.1;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .portfolio-hero-title {
        font-size: 3.75rem;
    }
}

.portfolio-hero-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    font-weight: 400;
    line-height: 1.625;
    max-width: 48rem;
    margin-bottom: 2.5rem;
}

@media (min-width: 768px) {
    .portfolio-hero-description {
        font-size: 1.25rem;
    }
}

.portfolio-tech-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.portfolio-tech-badge {
    font-size: 0.875rem;
    color: var(--color-emerald-700);
    background-color: var(--color-emerald-50);
    border: 1px solid #a7f3d0;
    padding: 0.375rem 1rem;
    font-weight: 500;
}

.portfolio-hero-actions {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

@media (min-width: 640px) {
    .portfolio-hero-actions {
        flex-direction: row;
    }
}

.btn-portfolio {
    border-color: var(--color-emerald-600);
    color: var(--color-emerald-600);
}

.btn-portfolio:hover {
    background-color: var(--color-emerald-600);
    color: var(--color-white);
}

.btn-portfolio-dark {
    border-color: var(--color-gray-900);
    color: var(--color-gray-900);
}

.btn-portfolio-dark:hover {
    background-color: var(--color-gray-900);
    color: var(--color-white);
}

/* Portfolio Section Headers */
.portfolio-section-header {
    text-align: center;
    margin-bottom: 6rem;
}

.portfolio-section-title {
    font-size: 2.25rem;
    font-weight: 600;
    margin-bottom: 2rem;
    color: var(--color-gray-900);
    line-height: 1.2;
}

@media (min-width: 768px) {
    .portfolio-section-title {
        font-size: 3rem;
    }
}

.portfolio-section-description {
    font-size: 1.125rem;
    color: var(--color-gray-600);
    max-width: 40rem;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.625;
}

/* Portfolio Problem Section */
.portfolio-problem-section {
    padding: 8rem 0;
    background-color: var(--color-gray-50);
    transition: background-color 0.7s ease;
}

.portfolio-problem-section.darker {
    background-color: var(--color-gray-200);
}

.portfolio-problem-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

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

.portfolio-problem-card {
    border: 1px solid var(--color-gray-200);
    padding: 2rem;
    background-color: var(--color-white);
}

.portfolio-problem-icon {
    height: 2rem;
    width: 2rem;
    color: var(--color-emerald-600);
    stroke-width: 1.5;
    margin-bottom: 1.25rem;
}

.portfolio-problem-title {
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--color-gray-900);
    margin-bottom: 0.75rem;
}

.portfolio-problem-description {
    color: var(--color-gray-600);
    font-weight: 400;
    line-height: 1.625;
    font-size: 1rem;
}

/* Portfolio Solution Section */
.portfolio-solution-section {
    padding: 8rem 0;
    background-color: var(--color-white);
}

.portfolio-demo-container {
    margin-bottom: 4rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--border-radius-md);
    overflow: hidden;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.portfolio-demo-image {
    width: 100%;
    display: block;
}

.portfolio-solution-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 3rem;
}

@media (min-width: 768px) {
    .portfolio-solution-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.portfolio-solution-item {
    text-align: center;
}

.portfolio-solution-icon-wrapper {
    margin-bottom: 2rem;
    display: flex;
    justify-content: center;
}

.portfolio-solution-icon {
    height: 2.5rem;
    width: 2.5rem;
    color: var(--color-emerald-600);
    stroke-width: 1.5;
}

.portfolio-solution-title {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    color: var(--color-gray-900);
}

.portfolio-solution-description {
    color: var(--color-gray-600);
    line-height: 1.625;
    font-weight: 400;
    font-size: 1rem;
}

/* Portfolio Technical Deep Dive Section */
.portfolio-tech-deep-section {
    padding: 8rem 0;
    background-color: var(--color-gray-50);
    transition: background-color 0.7s ease;
}

.portfolio-tech-deep-section.darker {
    background-color: var(--color-gray-200);
}

.portfolio-tech-deep-list {
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.portfolio-tech-deep-card {
    border: 1px solid var(--color-gray-200);
    padding: 2.5rem;
    background-color: var(--color-white);
    transform: scale(1.01);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

.portfolio-tech-deep-content {
    display: flex;
    align-items: flex-start;
    gap: 2rem;
}

.portfolio-tech-deep-icon-wrapper {
    flex-shrink: 0;
}

.portfolio-tech-deep-icon {
    height: 2.5rem;
    width: 2.5rem;
    color: var(--color-emerald-600);
    stroke-width: 1.5;
}

.portfolio-tech-deep-text {
    flex: 1;
}

.portfolio-tech-deep-title {
    font-size: 1.5rem;
    font-weight: 500;
    color: var(--color-gray-900);
    margin-bottom: 1rem;
}

.portfolio-tech-deep-description {
    color: var(--color-gray-600);
    margin-bottom: 1.5rem;
    font-weight: 400;
    line-height: 1.625;
    font-size: 1rem;
}

.portfolio-tech-deep-details {
    list-style: none;
    padding: 0;
    margin: 0 0 1.5rem 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.portfolio-tech-deep-details li {
    color: var(--color-gray-600);
    font-size: 0.875rem;
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.portfolio-tech-deep-details li::before {
    content: "•";
    color: var(--color-emerald-600);
    margin-top: 0.25rem;
    flex-shrink: 0;
}

.portfolio-tech-deep-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.portfolio-tech-deep-tag {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    background-color: var(--color-gray-100);
    padding: 0.25rem 0.75rem;
    font-weight: 400;
}

/* Portfolio Outcomes Section */
.portfolio-outcomes-section {
    padding: 8rem 0;
    background-color: var(--color-white);
}

.portfolio-outcomes-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

@media (min-width: 640px) {
    .portfolio-outcomes-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 768px) {
    .portfolio-outcomes-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.portfolio-outcome-card {
    text-align: center;
    border: 1px solid var(--color-gray-200);
    padding: 2rem;
    background-color: var(--color-white);
}

.portfolio-outcome-metric {
    font-size: 3rem;
    font-weight: 600;
    color: var(--color-emerald-600);
    margin-bottom: 0.75rem;
}

.portfolio-outcome-label {
    font-size: 1.125rem;
    font-weight: 500;
    color: var(--color-gray-900);
    margin-bottom: 0.5rem;
}

.portfolio-outcome-detail {
    font-size: 0.875rem;
    color: var(--color-gray-500);
    font-weight: 400;
}

/* Portfolio Footer Section */
.portfolio-footer-section {
    padding: 3rem 0;
    background-color: var(--color-gray-50);
    border-top: 1px solid var(--color-gray-200);
}

.portfolio-footer-text {
    text-align: center;
    color: var(--color-gray-600);
    font-weight: 500;
}

.portfolio-footer-text .author-link {
    color: var(--color-emerald-600);
    text-decoration: underline;
    transition: var(--transition-all);
}

.portfolio-footer-text .author-link:hover {
    color: var(--color-emerald-700);
}

/* Portfolio Responsive Design */
@media (max-width: 768px) {
    .portfolio-tech-deep-content {
        flex-direction: column;
        text-align: center;
    }

    .portfolio-tech-deep-icon-wrapper {
        display: flex;
        justify-content: center;
    }

    .portfolio-tech-deep-details li {
        text-align: left;
    }
}

/* ========================================
   Platform Case Study Styles
   ======================================== */
.platform-architecture-diagram {
    margin-top: 6rem;
    border: 1px solid var(--color-gray-200);
    border-radius: 1.5rem;
    padding: 3rem 2rem;
    background-color: var(--color-gray-50);
    box-shadow: 0 20px 35px -15px rgba(0, 0, 0, 0.15);
}

.platform-architecture-title {
    font-size: 2rem;
    text-align: center;
    font-weight: 600;
    color: var(--color-gray-900);
    margin-bottom: 2.5rem;
}

.platform-architecture-scroll {
    overflow-x: auto;
    padding-bottom: 1rem;
}

.platform-architecture-scroll::-webkit-scrollbar {
    height: 0.5rem;
}

.platform-architecture-scroll::-webkit-scrollbar-thumb {
    background-color: var(--color-gray-200);
    border-radius: 999px;
}

.platform-architecture-stack {
    min-width: 320px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.platform-architecture-card {
    width: 100%;
    max-width: 28rem;
    border: 1px solid var(--color-gray-200);
    border-radius: 1rem;
    padding: 2rem;
    background-color: var(--color-white);
}

.platform-architecture-card-management {
    border-color: rgba(16, 185, 129, 0.3);
}

.platform-architecture-card-workload {
    border-color: rgba(59, 130, 246, 0.2);
}

.platform-architecture-card-shared {
    border-color: rgba(99, 102, 241, 0.2);
}

.platform-architecture-meta {
    text-align: center;
    margin-bottom: 1.25rem;
}

.platform-architecture-label {
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-emerald-600);
    font-weight: 600;
}

.platform-architecture-subtitle {
    font-size: 0.95rem;
    color: var(--color-gray-600);
    margin-top: 0.25rem;
}

.platform-architecture-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
}

.platform-architecture-badge {
    font-size: 0.75rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
    background-color: var(--color-white);
    white-space: nowrap;
}

.platform-architecture-connector {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    color: var(--color-gray-400);
}

.platform-architecture-line {
    width: 1px;
    height: 3rem;
    background: linear-gradient(180deg, rgba(107, 114, 128, 0.2), rgba(107, 114, 128, 0.6));
}

.platform-architecture-line-short {
    height: 1.5rem;
}

.platform-architecture-connector-label {
    font-size: 0.75rem;
    color: var(--color-emerald-600);
    font-weight: 600;
    letter-spacing: 0.05em;
}

.platform-architecture-arrow {
    font-size: 0.85rem;
}

.platform-architecture-branches {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    width: 100%;
}

@media (min-width: 768px) {
    .platform-architecture-branches {
        flex-direction: row;
        justify-content: center;
    }

    .platform-architecture-branch {
        position: relative;
        flex: 1;
        display: flex;
        justify-content: center;
    }

    .platform-architecture-branch::before {
        content: "";
        position: absolute;
        top: -1.5rem;
        left: 50%;
        width: 1px;
        height: 1.5rem;
        background-color: rgba(107, 114, 128, 0.5);
    }

    .platform-architecture-branch::after {
        content: "";
        position: absolute;
        top: -1.5rem;
        width: 60%;
        height: 1px;
        left: 20%;
        background-color: rgba(107, 114, 128, 0.35);
    }
}

@media (max-width: 640px) {
    .platform-architecture-diagram {
        padding: 2rem 1.5rem;
    }

    .platform-architecture-card {
        padding: 1.5rem;
    }
}