/* ==========================================
   CSS VARIABLE & THEME SETTINGS
   ========================================== */
:root {
    /* Light Theme Color Palette */
    --primary-color: #3b82f6;      /* Blue */
    --primary-hover: #1d4ed8;
    --accent-color: #ec4899;       /* Pink/Purple */
    --accent-hover: #db2777;
    --bg-color: #f8fafc;           /* Light slate */
    --bg-alt-color: #ffffff;       /* Pure White */
    --text-color: #1e293b;         /* Dark Slate */
    --text-muted: #64748b;         /* Medium Slate */
    --card-bg: #ffffff;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -4px rgba(0, 0, 0, 0.05);
    --card-border: #e2e8f0;
    --input-border: #cbd5e1;
    --navbar-bg: rgba(255, 255, 255, 0.85);
    --transition-speed: 0.3s;
    --font-sans: 'Inter', sans-serif;
    --font-heading: 'Poppins', sans-serif;
}

[data-theme="dark"] {
    /* Dark Theme Color Palette */
    --bg-color: #0f172a;           /* Deep Slate */
    --bg-alt-color: #1e293b;       /* Dark slate */
    --text-color: #f8fafc;         /* White Slate */
    --text-muted: #94a3b8;         /* Gray Slate */
    --card-bg: #1e293b;
    --card-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.3);
    --card-border: #334155;
    --input-border: #475569;
    --navbar-bg: rgba(15, 23, 42, 0.85);
}

/* ==========================================
   BASE & RESET STYLES
   ========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

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

/* Section styling */
section {
    padding: 5rem 0;
}

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

/* Section Header */
.section-header {
    text-align: center;
    margin-bottom: 3.5rem;
}

.section-header .subtitle {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--primary-color);
    display: inline-block;
    margin-bottom: 0.5rem;
}

.section-header .section-title {
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
}

.section-header .divider {
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    margin: 0.75rem auto 0;
    border-radius: 2px;
}

/* ==========================================
   BUTTON STYLES
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-heading);
    font-weight: 600;
    padding: 0.75rem 1.75rem;
    border-radius: 8px;
    transition: all var(--transition-speed) ease;
    cursor: pointer;
    font-size: 0.95rem;
    border: none;
}

.btn-primary {
    background-color: var(--primary-color);
    color: #ffffff;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.2);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background-color: var(--bg-alt-color);
    color: var(--text-color);
    border: 1px solid var(--card-border);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* ==========================================
   NAVBAR & HEADER
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: var(--navbar-bg);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--card-border);
    transition: background-color var(--transition-speed);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 4.5rem;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-color);
}

.logo span {
    color: var(--primary-color);
}

.nav-menu ul {
    display: flex;
    gap: 2rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary-color);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--primary-color);
    transition: width var(--transition-speed);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

/* Theme Toggle Button */
.theme-btn {
    background: none;
    border: 1px solid var(--card-border);
    color: var(--text-color);
    width: 2.5rem;
    height: 2.5rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.theme-btn:hover {
    background-color: var(--card-border);
    color: var(--primary-color);
}

/* Tambahan untuk icon desktop mode */
.theme-btn i.fa-desktop {
    font-size: 1.1rem;
}

/* Hamburger mobile menu */
.hamburger {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 24px;
    height: 18px;
    background: none;
    border: none;
    cursor: pointer;
}

.hamburger .bar {
    width: 100%;
    height: 2.5px;
    background-color: var(--text-color);
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* ==========================================
   HERO SECTION
   ========================================== */
.hero-section {
    position: relative;
    padding: 9rem 0 5rem;
    overflow: hidden;
}

.hero-container {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 3rem;
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

.badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background-color: rgba(59, 130, 246, 0.1);
    color: var(--primary-color);
    border-radius: 30px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 0.75rem;
}

.hero-title .highlight {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}

.hero-subtitle .class-text {
    color: var(--accent-color);
}

.hero-motto {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--text-muted);
    border-left: 3px solid var(--primary-color);
    padding-left: 1rem;
    margin-bottom: 2.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.hero-motto i {
    color: rgba(59, 130, 246, 0.4);
    font-size: 0.85rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
}

/* Typing cursor animation */
.cursor {
    display: inline-block;
    width: 2px;
    background-color: var(--text-color);
    animation: blink 0.75s infinite;
}

/* Hero image and rotating avatar SVG */
.hero-image {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeInScale 1s ease-out;
}

.image-wrapper {
    position: relative;
    width: 320px;
    height: 320px;
}

.avatar-svg {
    width: 100%;
    height: 100%;
}

.rotating-ring {
    transform-origin: 100px 100px;
    animation: rotate 20s linear infinite;
}

/* ==========================================
   ABOUT SECTION
   ========================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 3.5rem;
    align-items: flex-start;
}

.about-greeting {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.about-desc {
    color: var(--text-muted);
    margin-bottom: 1.25rem;
}

.personal-details {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 2rem;
}

.detail-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.detail-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
    padding: 0.6rem;
    border-radius: 8px;
    width: 2.75rem;
    height: 2.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-item strong {
    font-size: 0.9rem;
    color: var(--text-color);
}

.detail-item p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* Stats Card right side */
.about-stats-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--card-shadow);
}

.stats-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-box {
    text-align: center;
    padding: 1.25rem;
    background-color: var(--bg-color);
    border-radius: 12px;
    border: 1px solid var(--card-border);
    transition: transform var(--transition-speed);
}

.stat-box:hover {
    transform: translateY(-5px);
}

.stat-number {
    display: block;
    font-family: var(--font-heading);
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
}

.hobbies-box h4 {
    font-family: var(--font-heading);
    margin-bottom: 1rem;
    font-size: 1rem;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 0.5rem;
}

.hobbies-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.tag {
    font-size: 0.8rem;
    font-weight: 500;
    background-color: var(--bg-color);
    border: 1px solid var(--card-border);
    padding: 0.4rem 0.8rem;
    border-radius: 30px;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.tag i {
    color: var(--accent-color);
}

/* ==========================================
   MINAT & KEAHLIAN SECTION
   ========================================== */
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.skills-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.skills-category-title {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-color);
}

.skills-category-title i {
    color: var(--primary-color);
}

.skills-intro {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.75rem;
}

/* Skill Bars (Technical) */
.skill-bars {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.skill-bar-item .skill-info {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.4rem;
}

.progress-bar-container {
    width: 100%;
    height: 8px;
    background-color: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--card-border);
}

.progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    border-radius: 4px;
    transition: width 1.5s cubic-bezier(0.1, 1, 0.1, 1);
}

/* Soft Skills (Non-Technical) */
.soft-skills-grid {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.soft-skill-item {
    display: flex;
    gap: 1.25rem;
}

.soft-skill-icon {
    font-size: 1.5rem;
    color: var(--accent-color);
    background-color: rgba(236, 72, 153, 0.1);
    width: 3.25rem;
    height: 3.25rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.soft-skill-content h4 {
    font-family: var(--font-heading);
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.soft-skill-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* ==========================================
   TIMELINE (RENCANA MASA DEPAN) SECTION
   ========================================== */
.timeline-container {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding-left: 2rem;
    border-left: 3px solid var(--card-border);
}

.timeline-item {
    position: relative;
    margin-bottom: 3.5rem;
}

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

.timeline-dot {
    position: absolute;
    left: calc(-2rem - 9px);
    top: 5px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background-color: var(--bg-color);
    border: 4px solid var(--primary-color);
    transition: transform 0.3s;
}

.timeline-item:hover .timeline-dot {
    transform: scale(1.3);
    background-color: var(--accent-color);
    border-color: var(--accent-color);
}

.timeline-date {
    font-family: var(--font-heading);
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.4rem;
    font-size: 0.95rem;
}

.timeline-content {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 1.75rem;
    box-shadow: var(--card-shadow);
    transition: transform var(--transition-speed);
}

.timeline-content:hover {
    transform: translateX(5px);
}

.timeline-content h3 {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.timeline-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ==========================================
   CONTACT SECTION
   ========================================== */
.contact-grid {
    display: grid;
    grid-template-columns: 0.90fr 1.10fr;
    gap: 3.5rem;
    align-items: flex-start;
}

.contact-info h3, .contact-form-card h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.contact-info p {
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-bottom: 2.5rem;
}

.contact-list-item {
    display: flex;
    gap: 1.25rem;
    align-items: center;
}

.contact-icon {
    font-size: 1.25rem;
    color: var(--primary-color);
    background-color: rgba(59, 130, 246, 0.1);
    width: 2.75rem;
    height: 2.75rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-text strong {
    font-size: 0.85rem;
    color: var(--text-muted);
    display: block;
}

.contact-text p {
    font-size: 0.95rem;
    color: var(--text-color);
    margin-bottom: 0;
}

.social-links-box h4 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
    color: var(--text-muted);
}

.social-icons {
    display: flex;
    gap: 0.75rem;
}

.social-icons a {
    width: 2.5rem;
    height: 2.5rem;
    background-color: var(--bg-alt-color);
    border: 1px solid var(--card-border);
    color: var(--text-color);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1rem;
    box-shadow: 0 2px 4px rgba(0,0,0,0.02);
}

.social-icons a:hover {
    background-color: var(--primary-color);
    color: #ffffff;
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* Contact Form Card styling */
.contact-form-card {
    background-color: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: var(--card-shadow);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-color);
}

.form-group input, .form-group textarea {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    padding: 0.75rem;
    border: 1px solid var(--input-border);
    border-radius: 8px;
    background-color: var(--bg-color);
    color: var(--text-color);
    outline: none;
    transition: all var(--transition-speed);
}

.form-group input:focus, .form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
    background-color: var(--card-bg);
}

.form-status {
    margin-top: 1rem;
    font-size: 0.85rem;
    text-align: center;
    padding: 0.5rem;
    border-radius: 6px;
    display: none;
}

.form-status.success {
    background-color: rgba(16, 185, 129, 0.15);
    color: #10b981;
    display: block;
}

.form-status.error {
    background-color: rgba(239, 68, 68, 0.15);
    color: #ef4444;
    display: block;
}

/* ==========================================
   FOOTER & BOTTOM UI
   ========================================== */
.footer {
    background-color: var(--bg-alt-color);
    border-top: 1px solid var(--card-border);
    padding: 2.5rem 0;
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.footer-content p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.school-footer {
    font-weight: 500;
}

.animate-pulse {
    animation: pulse 1.5s infinite;
}

/* Back to Top Button */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 2.75rem;
    height: 2.75rem;
    background-color: var(--primary-color);
    color: #ffffff;
    border: none;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed);
    z-index: 99;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
}

/* ==========================================
   KEYFRAMES ANIMATIONS
   ========================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInScale {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes blink {
    50% { opacity: 0; }
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.15); color: #ef4444; }
}


/* ==========================================
   MEDIA QUERIES FOR RESPONSIVE DESIGN
   ========================================== */
@media (max-width: 992px) {
    html {
        font-size: 15px;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-motto {
        justify-content: center;
        border-left: none;
        border-bottom: 2px solid var(--primary-color);
        padding-left: 0;
        padding-bottom: 0.75rem;
    }

    .hero-cta {
        justify-content: center;
    }

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

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

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

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

    .nav-menu {
        position: fixed;
        top: 4.5rem;
        left: -100%;
        width: 100%;
        height: calc(100vh - 4.5rem);
        background-color: var(--bg-alt-color);
        border-top: 1px solid var(--card-border);
        transition: left 0.4s cubic-bezier(0.1, 1, 0.1, 1);
        z-index: 999;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu ul {
        flex-direction: column;
        align-items: center;
        padding: 3rem 0;
        gap: 2.5rem;
    }

    .nav-link {
        font-size: 1.1rem;
    }

    .hamburger.active .bar:nth-child(1) {
        transform: translateY(7.5px) rotate(45deg);
    }

    .hamburger.active .bar:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active .bar:nth-child(3) {
        transform: translateY(-7.5px) rotate(-45deg);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .image-wrapper {
        width: 260px;
        height: 260px;
    }

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