/* ===== CSS Variables ===== */
:root {
    --bg-primary: #fafafa;
    --bg-secondary: #ffffff;
    --bg-tertiary: #f4f4f5;

    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-muted: #a1a1aa;

    --accent: #10b981;
    --accent-light: #34d399;
    --accent-dark: #059669;

    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;

    --gradient-accent: linear-gradient(135deg, var(--accent), var(--accent-light));

    --border-color: #e4e4e7;
    --border-focus: var(--accent);

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px -5px rgba(0, 0, 0, 0.1);
    --shadow-accent: 0 4px 14px rgba(16, 185, 129, 0.3);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-full: 50px;

    --transition: 0.2s ease;
}

/* ===== Reset & Base ===== */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

a {
    text-decoration: none;
    color: inherit;
}

/* ===== Header ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: 1rem 2rem;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    transition: color var(--transition);
}

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

.nav-actions {
    display: flex;
    gap: 0.75rem;
}

.btn {
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.btn-ghost {
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    color: var(--text-primary);
}

.btn-primary {
    background: var(--accent);
    border: 1px solid var(--accent);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-dark);
    box-shadow: var(--shadow-accent);
}

/* ===== Hero Section ===== */
.hero {
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    background: linear-gradient(180deg, #f0fdf4 0%, var(--bg-primary) 100%);
}

.hero-content {
    max-width: 700px;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--accent-dark);
    margin-bottom: 2rem;
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.4;
    }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}

.highlight {
    color: var(--accent);
}

.hero-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0 auto 3rem;
    line-height: 1.7;
}

/* ===== Shortener Box ===== */
.shortener-box {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 0.5rem;
    box-shadow: var(--shadow-lg);
}

.input-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.25rem 0.25rem 0.25rem 1rem;
}

.input-icon {
    font-size: 1.25rem;
    color: var(--text-muted);
}

.url-input {
    flex: 1;
    padding: 1rem 0;
    background: transparent;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
}

.url-input::placeholder {
    color: var(--text-muted);
}

.shorten-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.75rem;
    background: var(--gradient-accent);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.shorten-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-accent);
}

.shorten-btn .btn-icon {
    transition: transform var(--transition);
}

.shorten-btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ===== Result Box ===== */
.result-box {
    display: none;
    margin-top: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

.result-box.active {
    display: block;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

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

.result-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: rgba(16, 185, 129, 0.1);
    border-bottom: 1px solid rgba(16, 185, 129, 0.2);
    color: var(--accent-dark);
    font-weight: 500;
}

.success-icon {
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    border-radius: 50%;
    color: white;
    font-size: 0.75rem;
}

.result-content {
    padding: 1.5rem;
}

.short-url-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
}

.short-url {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--accent);
}

.copy-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-sm);
    color: white;
    font-family: inherit;
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition);
}

.copy-btn:hover {
    background: var(--accent-dark);
}

.copy-btn.copied {
    background: var(--text-primary);
}

.result-meta {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.original-url {
    display: block;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.result-actions {
    display: flex;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
}

.action-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
}

.action-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent);
    color: var(--accent);
}

/* ===== Features Section ===== */
.features-section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.375rem 1rem;
    background: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--accent-dark);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.feature-card {
    padding: 2rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    transition: all var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent);
}

.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.feature-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ===== Analytics Section ===== */
.analytics-section {
    padding: 6rem 0;
    background: var(--bg-tertiary);
}

.analytics-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.analytics-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.analytics-text>p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.stats-preview {
    display: flex;
    gap: 1.5rem;
}

.stat-card {
    flex: 1;
    padding: 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.stat-change {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    background: rgba(16, 185, 129, 0.1);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent);
    margin-top: 0.5rem;
}

.analytics-visual {
    position: relative;
}

.chart-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.chart-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.chart-header span {
    font-weight: 600;
}

.chart-range {
    padding: 0.5rem 0.75rem;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.8rem;
    color: var(--text-secondary);
    cursor: pointer;
}

.chart-area {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    height: 150px;
    padding-bottom: 1rem;
}

.chart-bar {
    flex: 1;
    background: var(--gradient-accent);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: all var(--transition);
    cursor: pointer;
}

.chart-bar:hover {
    opacity: 0.8;
}

.chart-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

/* ===== Recent Section ===== */
.recent-section {
    padding: 6rem 0;
}

.links-table {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.empty-state {
    padding: 4rem 2rem;
    text-align: center;
    color: var(--text-muted);
}

.empty-icon {
    font-size: 3rem;
    display: block;
    margin-bottom: 1rem;
}

.link-row {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
    transition: background var(--transition);
}

.link-row:hover {
    background: var(--bg-tertiary);
}

.link-row:last-child {
    border-bottom: none;
}

.link-info {
    flex: 1;
}

.link-short {
    font-weight: 600;
    color: var(--accent);
    margin-bottom: 0.25rem;
}

.link-original {
    font-size: 0.8rem;
    color: var(--text-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 400px;
}

.link-stats {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.link-clicks {
    font-weight: 600;
}

.link-actions {
    display: flex;
    gap: 0.5rem;
    margin-left: 1rem;
}

.link-action {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-tertiary);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition);
}

.link-action:hover {
    background: var(--accent);
    color: white;
}

/* ===== Footer ===== */
.footer {
    padding: 4rem 0 2rem;
    background: var(--text-primary);
    color: white;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    padding-bottom: 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-brand .logo-text {
    color: white;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.6);
    margin-top: 0.5rem;
    font-size: 0.875rem;
}

.footer-links {
    display: flex;
    gap: 4rem;
}

.footer-column h4 {
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: rgba(255, 255, 255, 0.9);
}

.footer-column a {
    display: block;
    padding: 0.375rem 0;
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    transition: color var(--transition);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    padding-top: 2rem;
    text-align: center;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.5);
}

/* ===== Modal ===== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    width: 90%;
    max-width: 400px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }

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

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.125rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
}

.modal-body {
    padding: 2rem 1.5rem;
    text-align: center;
}

.qr-preview {
    width: 200px;
    height: 200px;
    margin: 0 auto 1.5rem;
    background: white;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 4px;
    padding: 1rem;
}

.qr-grid div {
    width: 24px;
    height: 24px;
    background: var(--text-primary);
    border-radius: 2px;
}

.qr-grid div:nth-child(odd) {
    background: transparent;
}

.qr-url {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: 1.5rem;
}

.download-qr-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: var(--accent);
    border: none;
    border-radius: var(--radius-md);
    color: white;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition);
}

.download-qr-btn:hover {
    background: var(--accent-dark);
}

/* ===== Toast ===== */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--text-primary);
    border-radius: var(--radius-md);
    color: white;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1001;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast-icon {
    color: var(--accent-light);
    font-weight: bold;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .analytics-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
}

@media (max-width: 768px) {

    .nav-links,
    .nav-actions {
        display: none;
    }

    .input-group {
        flex-wrap: wrap;
    }

    .shorten-btn {
        width: 100%;
        justify-content: center;
    }

    .result-actions {
        flex-wrap: wrap;
    }

    .action-btn {
        flex: 1;
        justify-content: center;
    }

    .footer-content {
        flex-direction: column;
        gap: 2rem;
    }

    .footer-links {
        gap: 2rem;
        flex-wrap: wrap;
    }

    .stats-preview {
        flex-direction: column;
    }
}