/* ===== Global Styles ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #3b82f6;
    --secondary-color: #10b981;
    --accent-color: #f59e0b;
    --dark-bg: #0f172a;
    --light-bg: #f0f9ff;
    --text-dark: #1e293b;
    --text-light: #64748b;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --glass-bg: rgba(255, 255, 255, 0.7);
    --scroll-behavior: smooth;
}

html {
    scroll-behavior: smooth;
    scroll-snap-type: y mandatory;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #f8fafc 0%, #f0f9ff 100%);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
    scroll-behavior: smooth;
    will-change: scroll-position;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== Navigation ===== */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo a {
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
    transition: transform var(--transition);
}

.nav-logo a:hover {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--text-dark);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    transition: all var(--transition);
    position: relative;
    padding: 8px 0;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    transition: width var(--transition);
}

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

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

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: 0.3s;
    border-radius: 2px;
}

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

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

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

/* ===== Hero Section ===== */
.hero {
    color: white;
    min-height: 700px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 60px 20px;
    position: relative;
    overflow: hidden;
}

.hero.vanta-background {
    background: none;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 500px;
    height: 500px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    blur: 100px;
    display: none;
}

.hero::after {
    content: '';
    position: absolute;
    bottom: -50%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: rgba(0, 0, 0, 0.1);
    border-radius: 50%;
    blur: 100px;
    display: none;
}

.hero-content {
    max-width: 700px;
    position: relative;
    z-index: 10;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    background: none;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    margin-bottom: 20px;
    animation: slideInDown 0.8s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: -1px;
}

.hero-subtitle {
    font-size: 22px;
    margin-bottom: 40px;
    opacity: 0.95;
    animation: slideInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) 0.2s both;
    font-weight: 400;
}

.cta-button {
    background-color: white;
    color: var(--primary-color);
    padding: 14px 40px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    transition: all var(--transition);
    animation: slideInUp 0.8s ease-out 0.4s both;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    display: inline-block;
    text-align: center;
    text-decoration: none;
}

.cta-button:hover {
    transform: translateY(-4px);
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.3);
}

.cta-button:active {
    transform: translateY(-2px);
}

/* ===== Sections ===== */
section {
    padding: 100px 20px;
    scroll-snap-align: start;
    scroll-snap-stop: always;
}

.section-title {
    font-size: 40px;
    font-weight: 800;
    text-align: center;
    margin-bottom: 60px;
    color: var(--text-dark);
    position: relative;
    padding-bottom: 20px;
    letter-spacing: -0.5px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-title.animate {
    opacity: 1;
    transform: translateY(0);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    border-radius: 2px;
}

/* ===== About Section ===== */
.about {
    background: linear-gradient(135deg, var(--light-bg) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.about-content {
    max-width: 700px;
    margin: 0 auto;
}

.about-text p {
    font-size: 17px;
    color: var(--text-light);
    margin-bottom: 24px;
    line-height: 1.8;
    font-weight: 400;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.about-text p.animate {
    opacity: 1;
    transform: translateY(0);
}

/* ===== Projects Section ===== */
.projects {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.project-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.project-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.15);
}

.project-image {
    width: 100%;
    height: 220px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
}

.project-image::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1), rgba(0, 0, 0, 0.1));
}

.placeholder-image {
    font-size: 18px;
    color: white;
    font-weight: 600;
    position: relative;
    z-index: 1;
}

.project-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

.project-info {
    padding: 28px;
}

.project-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text-dark);
}

.project-description {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 18px;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.1), rgba(16, 185, 129, 0.1));
    color: var(--primary-color);
    padding: 6px 14px;
    border-radius: 8px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid rgba(59, 130, 246, 0.2);
    transition: all var(--transition);
}

.tag:hover {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.15), rgba(16, 185, 129, 0.15));
    transform: scale(1.05);
}

/* ===== Skills Section ===== */
.skills {
    background: linear-gradient(135deg, var(--light-bg) 0%, rgba(59, 130, 246, 0.05) 100%);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.skill-item {
    background: white;
    padding: 32px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.skill-item:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.12);
}

.skill-title {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 24px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 12px 0;
    color: var(--text-light);
    border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    font-size: 14px;
    font-weight: 500;
    transition: all var(--transition);
}

.skill-list li:hover {
    color: var(--primary-color);
    padding-left: 8px;
}

.skill-list li:last-child {
    border-bottom: none;
}

/* ===== Certificates Section ===== */
.certificates {
    background-color: var(--light-bg);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.certificate-card {
    background-color: var(--card-bg);
    border-radius: 16px;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}

.certificate-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.certificate-info {
    padding: 25px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.certificate-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-dark);
}

.certificate-issuer {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 20px;
    flex-grow: 1;
}

.certificate-link {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    text-align: center;
    transition: transform var(--transition);
}

.certificate-link:hover {
    transform: scale(1.05);
}

/* ===== Contact Section ===== */
.contact {
    background: linear-gradient(135deg, rgba(59, 130, 246, 0.05) 0%, rgba(16, 185, 129, 0.05) 100%);
}

.contact-subtitle {
    text-align: center;
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 50px;
    font-weight: 400;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.4, 0, 0.2, 1), transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.contact-subtitle.animate {
    opacity: 1;
    transform: translateY(0);
}

.contact-content {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 700px;
    margin: 0 auto;
    background: white;
    padding: 60px 40px;
    border-radius: 20px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.5);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    border: 2px solid rgba(59, 130, 246, 0.1);
    border-radius: 12px;
    font-size: 14px;
    font-family: inherit;
    transition: all var(--transition);
    background: rgba(255, 255, 255, 0.7);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: white;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.1);
}

.submit-button {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 14px 30px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.submit-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(59, 130, 246, 0.4);
}

.submit-button:active {
    transform: translateY(-1px);
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 20px;
    justify-content: center;
    align-items: center;
    width: 100%;
}

.email-link {
    font-size: 18px;
    font-weight: 700;
    padding: 18px 40px;
    background: white;
    color: var(--primary-color) !important;
    border-radius: 14px;
    transition: all var(--transition);
    box-shadow: none;
    position: relative;
    width: 100%;
    text-align: center;
    border: 2px solid var(--primary-color);
    display: block;
    cursor: pointer;
}

.email-link:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white !important;
    border-color: transparent;
}

.email-link::before {
    content: 'Email';
    opacity: 1;
    transition: opacity var(--transition);
}

.email-link::after {
    content: 'c7cherianjoseph@gmail.com';
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    opacity: 0;
    transition: opacity var(--transition);
    font-size: 16px;
    font-weight: 600;
}

.email-link:hover::before {
    opacity: 0;
}

.email-link:hover::after {
    opacity: 1;
}

.contact-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 14px 32px;
    border-radius: 12px;
    border: 2px solid var(--primary-color);
    width: 100%;
}

.contact-link:not(.email-link):hover {
    color: white;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    border-color: transparent;
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

/* ===== Footer ===== */
.footer {
    background: linear-gradient(135deg, var(--text-dark) 0%, #1a273f 100%);
    color: white;
    text-align: center;
    padding: 40px 20px;
    font-weight: 500;
}

/* ===== Animations ===== */
@keyframes slideInDown {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

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

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll animation classes */
.fade-in {
    animation: fadeIn 0.8s ease-out forwards;
}

.slide-up {
    animation: slideInUp 0.8s ease-out forwards;
}

.fade-in-up {
    animation: fadeInUp 0.8s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    html {
        scroll-snap-type: y proximity;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(10px);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.1);
        padding: 20px 0;
        gap: 0;
    }

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

    .nav-item {
        padding: 15px 0;
        border-bottom: 1px solid rgba(59, 130, 246, 0.1);
    }

    .hamburger {
        display: flex;
    }

    .hero {
        min-height: 600px;
    }

    .hero-title {
        font-size: 40px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 32px;
    }

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

    .contact-content {
        padding: 40px 20px;
    }

    .contact-links {
        align-items: center;
    }

    .email-link,
    .contact-link {
        font-size: 15px;
        padding: 14px 24px;
    }

    section {
        padding: 60px 20px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 26px;
        margin-bottom: 40px;
    }

    .nav-menu {
        top: 70px;
    }

    section {
        padding: 50px 15px;
    }

    .cta-button {
        padding: 12px 32px;
        font-size: 14px;
    }

    .project-card {
        margin: 0;
    }

    .submit-button {
        width: 100%;
    }
}