/* ================================
   TITAN SERVICES - LIGHT THEME
   Modern Professional Portfolio
   ================================ */

/* ========== VARIABLES ========== */
:root {
    --color-white: #ffffff;
    --color-light: #f8f9fa;
    --color-lighter: #f0f2f5;
    --color-primary: #2563eb;
    --color-primary-dark: #1e40af;
    --color-primary-light: #3b82f6;
    --color-secondary: #8b5cf6;
    --color-accent: #06b6d4;
    --color-dark: #1e293b;
    --color-text: #334155;
    --color-text-light: #64748b;
    --color-border: #e2e8f0;
    --color-shadow: rgba(0, 0, 0, 0.08);
    
    --font-display: 'Poppins', sans-serif;
    --font-body: 'Inter', sans-serif;
    
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-white);
    color: var(--color-text);
    line-height: 1.7;
    overflow-x: hidden;
}

::selection {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* ========== LOADING SCREEN ========== */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background: var(--color-white);
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: fadeOut 0.6s ease 1.5s forwards;
}

.loading-content {
    width: 100%;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 0 2rem;
}

.loading-symbol {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.wings {
    width: 120px;
    height: 60px;
    border: 3px solid var(--color-primary);
    border-bottom: none;
    border-radius: 100% 100% 0 0;
    margin: 0 auto 50px auto;
    position: relative;
    animation: pulse 1.5s ease-in-out infinite;
}

.wings::before,
.wings::after {
    content: '';
    position: absolute;
    width: 2px;
    height: 30px;
    background: var(--color-primary);
    bottom: -30px;
}

.wings::before {
    left: 30%;
}

.wings::after {
    right: 30%;
}

.loading-text {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 600;
    letter-spacing: 4px;
    color: var(--color-primary);
    text-align: center;
    width: 100%;
    margin: 0 auto;
    animation: fadeInOut 1.5s ease-in-out infinite;
}

@keyframes fadeOut {
    to {
        opacity: 0;
        visibility: hidden;
    }
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes fadeInOut {
    0%, 100% { opacity: 0.4; }
    50% { opacity: 1; }
}

/* ========== NAVIGATION ========== */
#navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 1.5rem 0;
    z-index: 1000;
    transition: var(--transition-smooth);
    background: linear-gradient(180deg, var(--color-white) 0%, rgba(255, 255, 255, 0.95) 100%);
}

#navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 2px 10px var(--color-shadow);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.5px;
    color: var(--color-primary);
}

.nav-menu {
    display: flex;
    gap: 3rem;
}

.nav-link {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 500;
    text-decoration: none;
    color: var(--color-text);
    letter-spacing: 0.3px;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition-smooth);
}

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

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

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-dark);
    transition: var(--transition-fast);
}

/* ========== HERO SECTION ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 50%, #f8fafc 100%);
    padding: 8rem 2rem 4rem;
}

/* Fog Animation */
.fog-layer {
    position: absolute;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at center, rgba(37, 99, 235, 0.05) 0%, transparent 70%);
    animation: driftFog 20s ease-in-out infinite;
}

.fog-1 {
    animation-delay: 0s;
    opacity: 0.3;
}

.fog-2 {
    animation-delay: 7s;
    opacity: 0.2;
}

.fog-3 {
    animation-delay: 14s;
    opacity: 0.15;
}

@keyframes driftFog {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    33% {
        transform: translate(50px, -30px) scale(1.1);
    }
    66% {
        transform: translate(-30px, 50px) scale(0.9);
    }
}

.hero-content {
    position: relative;
    z-index: 10;
    text-align: center;
    max-width: 900px;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.hero-avatar {
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeIn 0.6s ease 0.5s both;
}

.avatar-image {
    width: 180px;
    height: 180px;
    border-radius: 50%;
    border: 4px solid var(--color-primary);
    box-shadow: 0 10px 40px rgba(37, 99, 235, 0.2);
    object-fit: cover;
    transition: var(--transition-smooth);
}

.avatar-image:hover {
    transform: scale(1.05);
    box-shadow: 0 15px 50px rgba(37, 99, 235, 0.3);
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-dark);
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeIn 0.6s ease 0.7s both;
}

.hero-description {
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--color-text);
    margin-bottom: 3rem;
    line-height: 1.8;
    opacity: 0;
    animation: fadeIn 0.6s ease 0.9s both;
}

.highlight-name {
    color: var(--color-primary);
    font-weight: 600;
}

.highlight-role {
    color: var(--color-secondary);
    font-weight: 600;
}

.hero-actions {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.6s ease 1.1s both;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1.2rem 2.5rem;
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    text-decoration: none;
    border: 2px solid;
    border-radius: 8px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    transition: var(--transition-smooth);
    z-index: -1;
}

.btn:hover::before {
    left: 0;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

.btn-primary::before {
    background: var(--color-primary-dark);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 99, 235, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-dark);
    border-color: var(--color-border);
}

.btn-secondary::before {
    background: var(--color-lighter);
}

.btn-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-arrow {
    width: 20px;
    height: 20px;
    transition: var(--transition-fast);
}

.btn:hover .btn-arrow {
    transform: translateX(5px);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 3rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--color-primary);
    font-family: var(--font-display);
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 2px;
    opacity: 0;
    animation: fadeIn 0.8s ease 1.3s both, bounce 2s ease-in-out 2s infinite;
}

.scroll-line {
    width: 2px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
}

@keyframes bounce {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(10px); }
}

/* ========== SECTIONS ========== */
.section {
    padding: 8rem 0;
    position: relative;
}

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

.section-header {
    display: flex;
    align-items: center;
    gap: 2rem;
    margin-bottom: 4rem;
}

.section-number {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-primary);
    letter-spacing: 1px;
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--color-dark);
}

.section-line {
    flex: 1;
    height: 2px;
    background: linear-gradient(to right, var(--color-border), transparent);
}

/* ========== SKILLS SECTION ========== */
.skills-section {
    background: var(--color-light);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.skill-category {
    padding: 2.5rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.skill-category:hover {
    border-color: var(--color-primary);
    transform: translateY(-10px);
    box-shadow: 0 20px 40px var(--color-shadow);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.category-icon {
    font-size: 2rem;
}

.category-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    padding: 0.6rem 1.2rem;
    background: var(--color-lighter);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    font-size: 0.95rem;
    border-radius: 20px;
    transition: var(--transition-fast);
}

.skill-tag:hover {
    background: var(--color-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
}

/* ========== EXPERIENCE SECTION ========== */
.experience-section {
    background: var(--color-white);
}

.mission-group {
    margin-bottom: 4rem;
}

.mission-group:last-child {
    margin-bottom: 0;
}

.mission-group-title {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.mission-rank {
    font-size: 2.5rem;
    opacity: 0.5;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 2px;
    height: 100%;
    background: linear-gradient(to bottom, var(--color-primary), var(--color-border));
}

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

.timeline-marker {
    position: absolute;
    left: -3.5rem;
    top: 0.5rem;
    width: 12px;
    height: 12px;
    background: var(--color-primary);
    border: 3px solid var(--color-white);
    border-radius: 50%;
    box-shadow: 0 0 0 3px var(--color-border);
}

.timeline-content h4 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.5rem;
}

.timeline-tag {
    font-family: var(--font-display);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-secondary);
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.timeline-content p:last-child {
    font-size: 1.1rem;
    color: var(--color-text);
    line-height: 1.8;
}

/* ========== PROJECTS SECTION ========== */
.projects-section {
    background: var(--color-light);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 2rem;
}

.project-card {
    position: relative;
    padding: 3rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    transition: var(--transition-smooth);
}

.project-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-10px);
    box-shadow: 0 20px 50px var(--color-shadow);
}

.project-content h3 {
    font-family: var(--font-display);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 1rem;
}

.project-content p {
    font-size: 1.1rem;
    color: var(--color-text);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.project-tools {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 2rem;
}

.project-tools span {
    padding: 0.5rem 1rem;
    background: var(--color-lighter);
    color: var(--color-text);
    font-size: 0.9rem;
    border: 1px solid var(--color-border);
    border-radius: 20px;
}

.project-link {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    text-decoration: none;
    letter-spacing: 0.5px;
    transition: var(--transition-fast);
}

.project-link:hover {
    color: var(--color-primary-dark);
    letter-spacing: 1px;
}

/* ========== EDUCATION SECTION ========== */
.education-section {
    background: var(--color-white);
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.education-card {
    display: flex;
    gap: 2rem;
    padding: 3rem;
    background: var(--color-lighter);
    border-left: 4px solid var(--color-primary);
    border-radius: 8px;
    transition: var(--transition-smooth);
}

.education-card:hover {
    background: var(--color-light);
    transform: translateX(10px);
}

.education-icon {
    font-size: 3rem;
    line-height: 1;
}

.education-content h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.8rem;
}

.education-institution {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--color-secondary);
    margin-bottom: 0.3rem;
}

.education-period {
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-light);
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.education-description {
    font-size: 1.05rem;
    color: var(--color-text);
    line-height: 1.7;
}

/* ========== CONTACT SECTION ========== */
.contact-section {
    background: var(--color-light);
}

.contact-intro {
    max-width: 700px;
    margin-bottom: 4rem;
}

.contact-intro h3 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 1rem;
}

.contact-intro p {
    font-size: 1.2rem;
    color: var(--color-text);
    line-height: 1.8;
}

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

.contact-card {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 2rem;
    background: var(--color-white);
    border: 1px solid var(--color-border);
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.contact-card:hover {
    border-color: var(--color-primary);
    transform: translateY(-5px);
    box-shadow: 0 10px 30px var(--color-shadow);
}

.contact-icon {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-primary);
    color: var(--color-white);
    border-radius: 10px;
    flex-shrink: 0;
}

.contact-icon svg {
    width: 24px;
    height: 24px;
}

.contact-card h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-dark);
    margin-bottom: 0.3rem;
}

.contact-card p {
    font-size: 1rem;
    color: var(--color-text-light);
}

/* ========== FOOTER ========== */
.footer {
    background: var(--color-white);
    padding: 4rem 0 2rem;
    border-top: 1px solid var(--color-border);
}

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

.footer-quote {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 500;
    font-style: italic;
    color: var(--color-primary);
    margin-bottom: 2rem;
}

.footer-info p {
    color: var(--color-text-light);
    margin-bottom: 0.5rem;
}

/* ========== ANIMATIONS ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

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

/* ========== RESPONSIVE ========== */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 70%;
        height: 100vh;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
        transition: var(--transition-smooth);
        border-left: 1px solid var(--color-border);
        box-shadow: -5px 0 20px var(--color-shadow);
    }

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

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    .section {
        padding: 5rem 0;
    }

    .section-header {
        flex-wrap: wrap;
    }

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

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

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

    .education-card {
        flex-direction: column;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 0 1.5rem;
    }

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

    .section-title {
        font-size: 2rem;
    }

    .btn {
        padding: 1rem 2rem;
        font-size: 0.85rem;
    }

    .timeline {
        padding-left: 2rem;
    }

    .timeline-marker {
        left: -2.5rem;
    }

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

    .avatar-image {
        width: 140px;
        height: 140px;
    }
}

/* ========== SCROLL REVEAL ========== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* ========== SCROLL PROGRESS BAR ========== */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(to right, var(--color-primary), var(--color-secondary));
    z-index: 10001;
    transition: width 0.1s ease;
}