/* ====================================
   CSS CUSTOM PROPERTIES (Design Tokens)
   ==================================== */
:root {
    /* Brand Colors */
    --color-primary: #44A6BE;
    --color-accent: #F56567;
    --color-text: #4A646A;
    --color-bg: #FFFFFF;
    --color-light-gray: #F5F7F9;
    --color-border: #E0E5E9;

    /* Typography */
    --font-family: 'Nunito', sans-serif;
    --font-weight-regular: 400;
    --font-weight-bold: 700;
    --font-weight-black: 900;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Shadows */
    --shadow-small: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-medium: 0 4px 16px rgba(0, 0, 0, 0.1);
    --shadow-large: 0 8px 24px rgba(0, 0, 0, 0.12);
    --shadow-header: 0 2px 10px rgba(0, 0, 0, 0.1);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-round: 50%;
}

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

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

body {
    font-family: var(--font-family);
    font-weight: var(--font-weight-regular);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.6;
    overflow-x: hidden;
}

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

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

ul,
ol {
    list-style-position: inside;
}

button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
}

/* ====================================
   UTILITY CLASSES
   ==================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.fade-in {
    animation: fadeIn 1s ease-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.scroll-animate {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease-out;
}

.scroll-animate.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ====================================
   HEADER
   ==================================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-header);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    transition: all var(--transition-normal);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: var(--font-weight-black);
    color: var(--color-primary);
    transition: color var(--transition-fast);
}

.logo:hover {
    color: var(--color-accent);
}

.nav {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    position: relative;
}

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

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: all var(--transition-normal);
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* Mobile Menu */
.mobile-menu {
    position: fixed;
    top: 70px;
    right: -100%;
    width: 280px;
    height: calc(100vh - 70px);
    background-color: var(--color-bg);
    box-shadow: var(--shadow-large);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    transition: right var(--transition-normal);
    z-index: 999;
}

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

.mobile-link {
    font-weight: var(--font-weight-bold);
    color: var(--color-text);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.mobile-link:hover {
    background-color: var(--color-light-gray);
    color: var(--color-primary);
}

/* ====================================
   BUTTONS
   ==================================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-bold);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #3890A8;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

.btn-accent:hover {
    background-color: #E04547;
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
}

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

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

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.9rem;
}

/* Specific accent color for PDF and badge buttons */
.project-card .btn-outline,
.certificate-buttons .btn-outline,
.achievement-card .btn-outline {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.project-card .btn-outline:hover,
.certificate-buttons .btn-outline:hover,
.achievement-card .btn-outline:hover {
    background-color: var(--color-accent);
    color: white;
    transform: translateY(-2px);
}

/* ====================================
   SECTION STYLES
   ==================================== */
.section {
    padding: var(--spacing-xxl) 0;
    min-height: 400px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: var(--font-weight-black);
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    font-size: 1.2rem;
    font-weight: var(--font-weight-regular);
    color: var(--color-text);
    text-align: center;
    margin-bottom: var(--spacing-xl);
    opacity: 0.8;
}

/* ====================================
   WELCOME SECTION
   ==================================== */
.welcome {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: url('./assets/images/welcome_background.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    padding-top: 70px;
}

.welcome-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(68, 166, 190, 0.5);
    z-index: 1;
}

.welcome-content {
    position: relative;
    z-index: 2;
    text-align: center;
    color: white;
    max-width: 900px;
    padding: var(--spacing-xl);
}

.welcome-title {
    font-size: 3.5rem;
    font-weight: var(--font-weight-black);
    margin-bottom: var(--spacing-md);
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.3);
    animation-delay: 0.2s;
}

.welcome-tagline {
    font-size: 1.5rem;
    font-weight: var(--font-weight-bold);
    margin-bottom: var(--spacing-xl);
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.3);
    animation-delay: 0.4s;
}

.welcome-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation-delay: 0.6s;
}

.welcome-buttons .btn-outline {
    border-color: white;
    color: white;
}

.welcome-buttons .btn-outline:hover {
    background-color: white;
    color: var(--color-primary);
}

/* ====================================
   ABOUT SECTION
   ==================================== */
.about {
    background-color: var(--color-bg);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
    align-items: center;
}

.about-image img {
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-large);
    width: 100%;
    max-width: 400px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    font-size: 1.1rem;
    line-height: 1.8;
}

.about-text .btn {
    margin-top: var(--spacing-md);
}

/* ====================================
   CARDS
   ==================================== */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.card {
    background-color: white;
    border-radius: var(--radius-md);
    padding: 0;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.card-body {
    padding: var(--spacing-lg);
}

.btn-outline-red {
    border: 2px solid var(--color-accent);
    color: var(--color-accent);
}

.btn-outline-red:hover {
    background-color: var(--color-accent);
    color: white;
    box-shadow: var(--shadow-medium);
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-large);
}

.card-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-round);
    background: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-sm);
    font-size: 1rem;
    color: white;
    flex-shrink: 0;
}

.card-header {
    display: flex;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.card-title {
    font-size: 1.4rem;
    font-weight: var(--font-weight-black);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 100%;
}

.card-institution,
.card-company {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: var(--spacing-xs);
}

.card-year,
.card-date,
.card-type {
    color: var(--color-text);
    opacity: 0.7;
    margin-bottom: var(--spacing-sm);
}

.card-description {
    margin-bottom: var(--spacing-md);
    line-height: 1.7;
}

.card-note {
    font-size: 0.9rem;
    font-style: italic;
    color: var(--color-primary);
    opacity: 0.8;
}

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

.education-card {
    max-width: 500px;
    margin: 0 auto;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.project-card {
    cursor: default;
    display: flex;
    flex-direction: column;
}

.project-image {
    width: 100%;
    height: 220px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    overflow: hidden;
    margin-bottom: 0;
    background-color: var(--color-light-gray);
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: var(--spacing-lg);
    padding-top: var(--spacing-sm);
}

.project-description {
    margin-bottom: var(--spacing-md);
    flex: 1;
}

.project-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
}

/* ====================================
   BADGES
   ==================================== */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: var(--font-weight-bold);
    white-space: nowrap;
}

.badge-primary {
    background-color: rgba(68, 166, 190, 0.15);
    color: var(--color-primary);
}

.badge-accent {
    background-color: rgba(245, 101, 103, 0.15);
    color: var(--color-accent);
}

/* ====================================
   EXPERIENCE SECTION (Timeline)
   ==================================== */
.experience {
    background-color: var(--color-light-gray);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: var(--spacing-xl) auto 0;
    padding-left: var(--spacing-lg);
    border-left: none;
}

.timeline::before {
    display: none;
}

.timeline-card {
    position: relative;
    background-color: white;
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    margin-left: 0;
    box-shadow: var(--shadow-small);
    transition: all var(--transition-normal);
}

.timeline-card:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-medium);
}

.timeline-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-round);
    background: var(--color-primary);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-right: var(--spacing-sm);
    font-size: 1rem;
    color: white;
    flex-shrink: 0;
    box-shadow: none;
}

.timeline-title {
    font-size: 1.3rem;
    font-weight: var(--font-weight-black);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.timeline-company {
    font-weight: var(--font-weight-bold);
    color: var(--color-primary);
    margin-bottom: 4px;
}

.timeline-type {
    font-weight: var(--font-weight-bold);
    color: var(--color-accent);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.timeline-date {
    color: var(--color-text);
    opacity: 0.7;
    margin-bottom: var(--spacing-md);
}

.timeline-responsibilities {
    margin-left: var(--spacing-md);
    color: var(--color-text);
}

.timeline-responsibilities li {
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

/* ====================================
   CERTIFICATES SECTION
   ==================================== */
.certificates {
    background-color: var(--color-bg);
}

.certificate-card {
    cursor: default;
}

.certificate-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    overflow: hidden;
    margin-bottom: 0;
    background-color: var(--color-light-gray);
}

.certificate-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.certificate-skills {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin: var(--spacing-md) 0;
}

.certificate-buttons {
    display: flex;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

/* ====================================
   ACHIEVEMENTS SECTION
   ==================================== */
.achievements {
    background-color: var(--color-light-gray);
}

.achievement-image {
    width: 100%;
    height: 200px;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    overflow: hidden;
    margin-bottom: 0;
    background-color: var(--color-bg);
}

.achievement-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.contact-card {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.contact-icon {
    width: 70px;
    height: 70px;
    border-radius: var(--radius-round);
    background: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    font-size: 2rem;
    color: white;
}

.contact-title {
    font-size: 1.3rem;
    font-weight: var(--font-weight-black);
    margin-bottom: var(--spacing-xs);
}

.contact-info {
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-weight: var(--font-weight-bold);
}

.contact-action {
    font-size: 0.9rem;
    color: var(--color-primary);
    opacity: 0.8;
}

.contact-card:hover .contact-icon {
    transform: scale(1.1) rotate(5deg);
}

/* ====================================
   FOOTER
   ==================================== */
.footer {
    background: var(--color-primary);
    color: white;
    text-align: center;
    padding: var(--spacing-lg);
}

.footer p {
    font-weight: var(--font-weight-bold);
}

/* ====================================
   MODAL
   ==================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-lg);
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    z-index: 2001;
    background-color: white;
    border-radius: var(--radius-lg);
    max-width: 90%;
    max-height: 90%;
    overflow: hidden;
    box-shadow: var(--shadow-large);
    animation: modalEnter 0.3s ease-out;
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.9);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-close {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-round);
    background-color: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    z-index: 2002;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background-color: #3890A8;
    transform: rotate(90deg);
}

.modal-body {
    width: 100%;
    height: 100%;
}

.modal-body img {
    width: 100%;
    height: auto;
    display: block;
}

.modal-body iframe {
    width: 100%;
    height: 80vh;
    border: none;
}

/* ====================================
   CAROUSEL
   ==================================== */
.carousel-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 2000;
    display: none;
    align-items: center;
    justify-content: center;
}

.carousel-container.active {
    display: flex;
}

.carousel-wrapper {
    position: relative;
    z-index: 2001;
    max-width: 90%;
    max-height: 90%;
    width: 800px;
}

.carousel-content {
    background-color: white;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-large);
}

.carousel-content img {
    width: 100%;
    height: auto;
    display: block;
}

.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 50px;
    height: 50px;
    border-radius: var(--radius-round);
    background-color: white;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    box-shadow: var(--shadow-medium);
    transition: all var(--transition-fast);
    z-index: 2002;
}

.carousel-btn:hover {
    background-color: var(--color-primary);
    color: white;
    transform: translateY(-50%) scale(1.1);
}

.carousel-prev {
    left: -70px;
}

.carousel-next {
    right: -70px;
}

.carousel-indicators {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.carousel-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-round);
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.carousel-dot.active {
    background-color: white;
    transform: scale(1.3);
}

/* ====================================
   RESPONSIVE DESIGN
   ==================================== */
@media (max-width: 768px) {

    /* Header */
    .nav {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    /* Welcome */
    .welcome {
        background-attachment: scroll;
    }

    .welcome-title {
        font-size: 2.2rem;
    }

    .welcome-tagline {
        font-size: 1.1rem;
    }

    .welcome-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    /* About */
    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    /* Section Titles */
    .section-title {
        font-size: 2rem;
    }

    /* Cards */
    .cards-grid {
        grid-template-columns: 1fr;
    }

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

    /* Timeline */
    .timeline {
        padding-left: 0;
    }

    .timeline::before {
        display: none;
        /* Hide vertical line on mobile */
    }

    .timeline-card {
        margin-left: 0;
        padding-top: var(--spacing-xl);
    }

    .timeline-icon {
        position: static;
        margin: 0 var(--spacing-sm) 0 0;
        width: 40px;
        height: 40px;
        font-size: 1rem;
        box-shadow: var(--shadow-small);
    }

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

    /* Carousel */
    .carousel-prev {
        left: 10px;
    }

    .carousel-next {
        right: 10px;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

@media (max-width: 480px) {
    .welcome-title {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.7rem;
    }

    .mobile-menu {
        width: 100%;
        right: -100%;
    }
}