/* style.css - light/dark mode with visible overlay, no Tailwind references */
:root {
    /* Dark mode (default) */
    --bg-gradient: linear-gradient(145deg, #1a0f2a, #2a1a3a, #301e4a);
    --surface: rgba(20, 10, 30, 0.6);
    --surface-light: rgba(255, 255, 255, 0.08);
    --text-primary: #f0e6ff;
    --text-secondary: #cbbae6;
    --accent: #d67eff;
    --accent-glow: #b155f0;
    --border: #4d3a63;
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.6), 0 0 0 1px rgba(255, 255, 255, 0.03);
    --shadow-hover: 0 25px 45px rgba(0, 0, 0, 0.8), 0 0 0 1px var(--accent);
    --navbar-bg: rgba(18, 8, 28, 0.75);
    --footer-bg: rgba(0, 0, 0, 0.4);
    --input-bg: rgba(0, 0, 0, 0.3);
    --overlay-bg: #0b0715;
    --overlay-card: #1e1a2b;
    --success: #a5f7b0;
    --error: #ffb0b0;
}

body.light-mode {
    --bg-gradient: linear-gradient(145deg, #f5f0ff, #e6d9ff, #d9c4ff);
    --surface: rgba(245, 240, 255, 0.7);
    --surface-light: rgba(255, 255, 255, 0.5);
    --text-primary: #1a0b2e;
    --text-secondary: #4a3a5e;
    --accent: #9f5eff;
    --accent-glow: #b77eff;
    --border: #c2a2ff;
    --shadow: 0 20px 40px rgba(0, 0, 0, 0.1), 0 0 0 1px rgba(255, 255, 255, 0.8);
    --shadow-hover: 0 25px 45px rgba(0, 0, 0, 0.15), 0 0 0 1px var(--accent);
    --navbar-bg: rgba(255, 255, 255, 0.75);
    --footer-bg: rgba(240, 230, 255, 0.7);
    --input-bg: rgba(255, 255, 255, 0.5);
    --overlay-bg: #2d2640;
    --overlay-card: #f0eaff;
    --success: #2e7d32;
    --error: #c62828;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
    transition: background-color 0.3s, border-color 0.2s;
}

body {
    background: var(--bg-gradient);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ----- LOADING OVERLAY (simple & visible) ----- */
.loading-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: var(--overlay-bg);
    backdrop-filter: blur(10px);
    z-index: 9999;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease, visibility 0.5s;
    font-family: 'Fira Code', monospace;
}

.overlay-card {
    background: var(--overlay-card);
    border-radius: 20px;
    width: 500px;
    max-width: 90%;
    box-shadow: 0 20px 50px rgba(0,0,0,0.8), 0 0 0 2px var(--accent);
    overflow: hidden;
    border: 1px solid var(--accent);
}

.overlay-header {
    background: rgba(0,0,0,0.2);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 10px;
    border-bottom: 1px solid var(--border);
}

.dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
}

.red { background: #ff5f56; }
.yellow { background: #ffbd2e; }
.green { background: #27c93f; }

.overlay-title {
    color: var(--text-secondary);
    margin-left: auto;
    font-size: 0.9rem;
    font-family: 'Fira Code', monospace;
}

.overlay-body {
    padding: 30px 25px;
    background: var(--overlay-card);
}

.command-line {
    font-family: 'Fira Code', monospace;
    font-size: 1.3rem;
    margin-bottom: 20px;
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
}

.prompt {
    color: #7ee97e;
    margin-right: 12px;
    font-weight: 500;
}

.command {
    color: var(--text-primary);
}

.cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent);
    font-weight: 300;
    margin-left: 2px;
}

.output-line {
    color: #6a9955;
    font-size: 1.1rem;
    font-family: 'Fira Code', monospace;
    min-height: 2rem;
    margin-bottom: 20px;
}

.loading-bar {
    width: 100%;
    height: 6px;
    background: var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.loading-fill {
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, var(--accent), var(--accent-glow));
    animation: loadProgress 7s linear forwards;
}

@keyframes loadProgress {
    0% { width: 0%; }
    100% { width: 100%; }
}
@keyframes blink { 50% { opacity: 0; } }

/* ----- navbar ----- */
.navbar {
    position: sticky;
    top: 0;
    background: var(--navbar-bg);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
    padding: 0.8rem 2rem;
}

.nav-container {
    max-width: 1300px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(145deg, var(--accent), #a56eff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo i { color: var(--accent); margin-right: 6px; }

.nav-menu {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
    text-shadow: 0 0 8px var(--accent);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent);
    box-shadow: 0 0 10px var(--accent);
}

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

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.6rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: transform 0.3s;
    padding: 0 0.3rem;
}

.theme-toggle:hover {
    transform: rotate(15deg);
    color: var(--accent);
}

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

.bar {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    margin: 3px 0;
    border-radius: 2px;
}

/* ----- sections general ----- */
section {
    padding: 5rem 1rem;
}

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

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
}

.gradient-text {
    background: linear-gradient(145deg, var(--accent), #a56eff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

/* ----- hero ----- */
.hero {
    min-height: 75vh;
    display: flex;
    align-items: center;
    text-align: center;
}

.hero-container {
    max-width: 900px;
    margin: 0 auto;
    animation: fadeInUp 1s ease;
}

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

.profile-img {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--accent);
    box-shadow: 0 0 40px var(--accent);
    margin-bottom: 2rem;
}

.hero h1 {
    font-size: 3.5rem;
    background: linear-gradient(145deg, var(--text-primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

.hero-title {
    font-size: 1.4rem;
    color: var(--text-secondary);
}

.hero-quote {
    font-size: 1.3rem;
    font-style: italic;
    margin: 2rem 0;
    color: var(--text-secondary);
}

.hero-buttons {
    display: flex;
    gap: 1.2rem;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 0.9rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: var(--surface-light);
    backdrop-filter: blur(4px);
    border: 1px solid var(--border);
    color: var(--text-primary);
}

.primary-btn {
    background: linear-gradient(145deg, var(--accent), #a56eff);
    border: 1px solid var(--accent);
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
}

.primary-btn:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px var(--accent);
}

.outline-btn:hover {
    background: var(--surface-light);
    border-color: var(--accent);
    transform: scale(1.05);
}

/* ----- skills grid ----- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--surface);
    backdrop-filter: blur(12px);
    border: 1px solid var(--border);
    border-radius: 30px;
    padding: 2rem 1rem;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.skill-card:hover {
    transform: translateY(-8px) scale(1.02);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.skill-card i {
    font-size: 3rem;
    background: linear-gradient(145deg, var(--accent), #a56eff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

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

.project-card {
    background: var(--surface);
    backdrop-filter: blur(16px);
    border-radius: 30px;
    padding: 1.8rem;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    border-color: var(--accent);
    box-shadow: var(--shadow-hover);
}

.iframe-preview {
    position: relative;
    width: 100%;
    height: 160px;
    border-radius: 20px;
    overflow: hidden;
    margin: 1rem 0;
    background: var(--overlay-card);
    border: 1px solid var(--border);
}

.iframe-preview iframe {
    width: 100%;
    height: 100%;
    border: none;
}

.project-card h3 {
    font-size: 1.5rem;
    background: linear-gradient(145deg, var(--accent), #a56eff);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.project-links {
    display: flex;
    gap: 0.8rem;
    margin-top: 1.5rem;
    flex-wrap: wrap;
}

.small-btn {
    padding: 0.5rem 1.2rem;
    font-size: 0.9rem;
}

/* ----- about ----- */
.about-content {
    background: var(--surface-light);
    backdrop-filter: blur(12px);
    padding: 2.5rem;
    border-radius: 50px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    font-size: 1.2rem;
}

.signature {
    margin-top: 2rem;
    font-weight: 600;
    color: var(--accent);
}

/* ----- contact ----- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2.5rem;
    align-items: start;
}

.contact-info, .contact-form {
    background: var(--surface-light);
    backdrop-filter: blur(12px);
    padding: 2rem;
    border-radius: 30px;
    border: 1px solid var(--border);
}

.contact-info p {
    margin: 1rem 0;
    font-size: 1.2rem;
    word-break: break-all;
}

.contact-info i {
    color: var(--accent);
    width: 35px;
}

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 1rem;
    margin-bottom: 1rem;
    background: var(--input-bg);
    border: 1px solid var(--border);
    border-radius: 40px;
    color: var(--text-primary);
    font-size: 1rem;
}

.contact-form textarea {
    border-radius: 30px;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 15px var(--accent);
}

.form-feedback {
    min-height: 2rem;
    font-weight: 500;
}

/* ----- footer ----- */
.footer {
    background: var(--footer-bg);
    backdrop-filter: blur(8px);
    padding: 2.5rem 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
}

.social-links {
    display: flex;
    gap: 1.8rem;
    justify-content: center;
    margin-bottom: 1.8rem;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 1.8rem;
    transition: all 0.3s ease;
}

.social-links a:hover {
    color: var(--accent);
    transform: translateY(-5px);
    text-shadow: 0 0 20px var(--accent);
}

/* scroll to top */
#scrollTopBtn {
    position: fixed;
    bottom: 30px; right: 30px;
    background: linear-gradient(145deg, var(--accent), #a56eff);
    border: none;
    width: 55px; height: 55px;
    border-radius: 50%;
    color: white;
    font-size: 1.4rem;
    cursor: pointer;
    box-shadow: 0 10px 30px var(--accent);
    opacity: 0;
    visibility: hidden;
    transition: all 0.5s ease;
    z-index: 99;
}

#scrollTopBtn.visible {
    opacity: 1;
    visibility: visible;
}

/* ----- responsive ----- */
@media (max-width: 768px) {
    .hamburger { display: flex; }
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background: var(--navbar-bg);
        backdrop-filter: blur(20px);
        width: 100%;
        text-align: center;
        padding: 2rem 0;
        gap: 2rem;
        transition: 0.3s;
        border-bottom: 1px solid var(--accent);
    }
    .nav-menu.active { left: 0; }
    .contact-grid { grid-template-columns: 1fr; }
    .hero h1 { font-size: 2.5rem; }
    .projects-grid { grid-template-columns: 1fr; }
    .skills-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 480px) {
    .hero-buttons { flex-direction: column; align-items: center; }
    .skills-grid { grid-template-columns: 1fr; }
    .overlay-body { padding: 20px; }
    .command-line { font-size: 1.1rem; }
}

/* Style for X SVG icon */
.x-icon {
    width: 1.8rem;
    height: 1.8rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    vertical-align: middle;
}

.social-links a:hover .x-icon {
    color: var(--accent);
    transform: translateY(-5px);
    filter: drop-shadow(0 0 20px var(--accent));
}