/* ========================================
   Sana Mustafa - Personal Portfolio
   ======================================== */

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

:root {
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #c9a96e;
    --color-accent-light: #d4b97a;
    --color-text: #2d2d2d;
    --color-text-light: #6b6b6b;
    --color-bg: #ffffff;
    --color-bg-alt: #f8f6f3;
    --color-bg-dark: #1a1a2e;
    --color-border: #e8e4df;
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --max-width: 1100px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

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

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.navbar.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: 0 1px 20px rgba(0, 0, 0, 0.06);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-light);
    transition: color var(--transition);
    letter-spacing: 0.02em;
}

.nav-links a:hover {
    color: var(--color-primary);
}

.nav-cta {
    background: var(--color-primary);
    color: #fff !important;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    transition: background var(--transition) !important;
}

.nav-cta:hover {
    background: var(--color-secondary) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    background: var(--color-bg-alt);
}

.hero-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(201, 169, 110, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(26, 26, 46, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 80%, rgba(201, 169, 110, 0.06) 0%, transparent 50%);
}

.hero-content {
    text-align: center;
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-accent);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.2s;
}

.hero-name {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.1;
    margin-bottom: 1.5rem;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.4s;
}

.hero-tagline-wrapper {
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.6s;
}

.hero-tagline {
    font-size: 1.125rem;
    color: var(--color-text-light);
    font-weight: 400;
    line-height: 1.6;
}

.hero-location {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 0.8s;
}

.hero-actions {
    margin-top: 2.5rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeUp 0.8s ease forwards 1s;
}

.btn {
    display: inline-block;
    padding: 0.85rem 2rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    transition: all var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--color-primary);
    color: #fff;
}

.btn-primary:hover {
    background: var(--color-secondary);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(26, 26, 46, 0.2);
}

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

.btn-outline:hover {
    background: var(--color-primary);
    color: #fff;
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: fadeIn 0.8s ease forwards 1.5s;
}

.scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--color-text-light);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: var(--color-accent);
    animation: scrollPulse 2s ease-in-out infinite;
}

/* --- Sections --- */
.section {
    padding: 6rem 0;
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--color-accent);
    border-radius: 2px;
}

/* --- About Section --- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

.about-lead {
    font-size: 1.15rem;
    line-height: 1.8;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.about-text p {
    color: var(--color-text-light);
    line-height: 1.8;
}

.competencies-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.25rem;
}

.competency-card {
    background: var(--color-bg-alt);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.competency-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    border-color: var(--color-accent);
}

.competency-icon {
    color: var(--color-accent);
    font-size: 1.25rem;
    margin-bottom: 0.75rem;
}

.competency-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.4rem;
}

.competency-card p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* --- Achievements --- */
.achievements-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

.achievement-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-bg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.achievement-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.08);
}

.achievement-number {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    line-height: 1;
    margin-bottom: 0.5rem;
}

.achievement-label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.75rem;
}

.achievement-card p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    line-height: 1.5;
}

/* --- Timeline / Experience --- */
.timeline {
    position: relative;
    padding-left: 2.5rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

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

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

.timeline-marker {
    position: absolute;
    left: -2.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
    box-shadow: 0 0 0 2px var(--color-accent);
    transform: translateX(-5px);
}

.timeline-content {
    background: var(--color-bg-alt);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.timeline-content:hover {
    border-color: var(--color-accent);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.06);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1.25rem;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.timeline-header h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-primary);
}

.company {
    font-size: 0.95rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-top: 0.2rem;
}

.timeline-meta {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.location, .dates {
    font-size: 0.8rem;
    color: var(--color-text-light);
}

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

.timeline-details {
    list-style: none;
}

.timeline-details li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
    color: var(--color-text-light);
    line-height: 1.6;
}

.timeline-details li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.6rem;
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: var(--color-accent);
}

/* --- Education --- */
.education-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.subsection-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1.5rem;
}

.education-card {
    background: var(--color-bg);
    padding: 1.5rem;
    border-radius: 10px;
    border: 1px solid var(--color-border);
    margin-bottom: 1rem;
    transition: all var(--transition);
}

.education-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
}

.edu-year {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: 0.4rem;
}

.education-card h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.3rem;
}

.education-card p {
    font-size: 0.85rem;
    color: var(--color-text-light);
}

.cert-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.cert-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--color-bg);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.cert-item:hover {
    border-color: var(--color-accent);
    transform: translateX(5px);
}

.cert-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 90px;
    padding: 0.3rem 0.75rem;
    background: var(--color-primary);
    color: #fff;
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 4px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    text-align: center;
}

.cert-item span:last-child {
    font-size: 0.9rem;
    color: var(--color-text);
}

/* --- Skills --- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.skill-category h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-accent);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    display: inline-block;
    padding: 0.45rem 1rem;
    background: var(--color-bg-alt);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    font-size: 0.8rem;
    color: var(--color-text);
    font-weight: 500;
    transition: all var(--transition);
}

.skill-tag:hover {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

/* --- Contact --- */
.contact-content {
    text-align: center;
}

.contact-lead {
    font-size: 1.1rem;
    color: var(--color-text-light);
    max-width: 500px;
    margin: 0 auto 2.5rem;
    line-height: 1.7;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.contact-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 2rem 1rem;
    background: var(--color-bg);
    border-radius: 12px;
    border: 1px solid var(--color-border);
    transition: all var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.08);
    border-color: var(--color-accent);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-alt);
    border-radius: 50%;
    font-size: 1.2rem;
    color: var(--color-accent);
    margin-bottom: 1rem;
    font-weight: 700;
}

.contact-card h4 {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.3rem;
}

.contact-card p {
    font-size: 0.8rem;
    color: var(--color-text-light);
    word-break: break-word;
}

/* --- Footer --- */
.footer {
    padding: 2rem 0;
    text-align: center;
    background: var(--color-primary);
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.85rem;
}

/* --- Animations --- */
@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); transform-origin: top; }
    50% { opacity: 1; transform: scaleY(1); }
}

/* Scroll reveal */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .achievements-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(10px);
        flex-direction: column;
        padding: 2rem;
        gap: 1.25rem;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

    .section {
        padding: 4rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .achievements-grid {
        grid-template-columns: 1fr 1fr;
        gap: 1rem;
    }

    .achievement-number {
        font-size: 2rem;
    }

    .education-grid {
        grid-template-columns: 1fr;
        gap: 2.5rem;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline-header {
        flex-direction: column;
    }

    .timeline-meta {
        text-align: left;
    }

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

@media (max-width: 480px) {
    .hero-name {
        font-size: 2.25rem;
    }

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

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

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

    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
}