/**
 * USHORTAPP.COM - Core Design System & Stylesheet
 * Modern SaaS aesthetic, high contrast, clean typography, responsive layout.
 */

:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --primary-border: #bfdbfe;
    --secondary: #475569;
    --dark: #0f172a;
    --dark-surface: #1e293b;
    --light-bg: #f8fafc;
    --card-bg: #ffffff;
    --border: #e2e8f0;
    --border-hover: #cbd5e1;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --text-light: #94a3b8;
    --success: #10b981;
    --success-bg: #ecfdf5;
    --danger: #ef4444;
    --danger-bg: #fef2f2;
    --warning: #f59e0b;
    --warning-bg: #fffbeb;
    --purple: #8b5cf6;
    --purple-bg: #f5f3ff;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-full: 9999px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
    --font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background-color: var(--light-bg);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s ease;
}
a:hover {
    color: var(--primary-hover);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
}

/* ==========================================================
   Navigation Bar
   ========================================================== */
.site-header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.35rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
}
.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: var(--primary-light);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-sm);
    font-size: 1.1rem;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}
.nav-link {
    color: var(--secondary);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}
.nav-link:hover {
    color: var(--dark);
    background-color: var(--light-bg);
}
.nav-toggle {
    display: none;
    background: transparent;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 5px;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--dark);
    border-radius: 2px;
}

/* ==========================================================
   Buttons & Badges
   ========================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: inherit;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.65rem 1.25rem;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s ease;
    text-align: center;
    white-space: nowrap;
}
.btn-primary {
    background-color: var(--primary);
    color: #ffffff;
    border-color: var(--primary);
    box-shadow: 0 2px 4px rgba(37, 99, 235, 0.2);
}
.btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: #ffffff;
}
.btn-outline {
    background-color: #ffffff;
    color: var(--secondary);
    border-color: var(--border);
}
.btn-outline:hover {
    background-color: var(--light-bg);
    color: var(--dark);
    border-color: var(--border-hover);
}
.btn-dark {
    background-color: var(--dark);
    color: #ffffff;
}
.btn-dark:hover {
    background-color: var(--dark-surface);
    color: #ffffff;
}
.btn-danger {
    background-color: var(--danger);
    color: #ffffff;
}
.btn-danger:hover {
    background-color: #dc2626;
    color: #ffffff;
}
.btn-success {
    background-color: var(--success);
    color: #ffffff;
}
.btn-ghost {
    background: transparent;
    color: var(--secondary);
    border: none;
}
.btn-sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.85rem;
}
.btn-xs {
    padding: 0.25rem 0.6rem;
    font-size: 0.75rem;
    border-radius: var(--radius-sm);
}
.btn-lg {
    padding: 0.85rem 1.75rem;
    font-size: 1.05rem;
}
.btn-block {
    width: 100%;
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.2rem 0.55rem;
    font-size: 0.75rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.badge-active { background-color: var(--success-bg); color: var(--success); }
.badge-expired { background-color: var(--warning-bg); color: var(--warning); }
.badge-disabled { background-color: var(--light-bg); color: var(--text-muted); }
.badge-blocked { background-color: var(--danger-bg); color: var(--danger); }
.badge-alias { background-color: var(--primary-light); color: var(--primary); }
.badge-purple { background-color: var(--purple-bg); color: var(--purple); }
.badge-admin { font-size: 0.65rem; background: #fbbf24; color: #78350f; padding: 2px 6px; border-radius: 4px; }

/* ==========================================================
   Alerts & Notifications
   ========================================================== */
.flash-container {
    margin-top: 1rem;
}
.alert {
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
}
.alert-success { background: var(--success-bg); color: #065f46; border-color: #a7f3d0; }
.alert-danger { background: var(--danger-bg); color: #991b1b; border-color: #fecaca; }
.alert-info { background: var(--primary-light); color: #1e40af; border-color: #bfdbfe; }

/* ==========================================================
   Hero & Shortener 3-Column Monetization Layout
   ========================================================== */
.hero-section {
    padding: 3.5rem 0 4rem;
    background: radial-gradient(circle at 50% 0%, #eff6ff 0%, var(--light-bg) 70%);
}
.hero-header {
    text-align: center;
    max-width: 750px;
    margin: 0 auto 2.5rem;
}
.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: #ffffff;
    border: 1px solid var(--border);
    padding: 0.35rem 0.9rem;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--secondary);
    box-shadow: var(--shadow-sm);
    margin-bottom: 1rem;
}
.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    box-shadow: 0 0 0 2px var(--success-bg);
}
.hero-title {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -1px;
    color: var(--dark);
    line-height: 1.15;
    margin-bottom: 0.75rem;
}
.hero-subtitle {
    font-size: 1.15rem;
    color: var(--secondary);
    line-height: 1.5;
}

/* 3-Column Grid */
.shortener-monetization-grid {
    display: grid;
    grid-template-columns: 280px 1fr 280px;
    gap: 1.5rem;
    align-items: start;
}

.ad-column {
    display: flex;
    justify-content: center;
    min-height: 250px;
}
.ad-slot-container {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}
.ad-placeholder-box {
    width: 100%;
    min-height: 250px;
    background: #ffffff;
    border: 1px dashed var(--border-hover);
    border-radius: var(--radius-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
}
.ad-badge {
    font-size: 0.7rem;
    text-transform: uppercase;
    background: var(--light-bg);
    border: 1px solid var(--border);
    padding: 2px 8px;
    border-radius: var(--radius-full);
    margin-bottom: 0.75rem;
}

.shortener-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-xl);
}

.input-group-main {
    display: flex;
    align-items: center;
    background: #ffffff;
    border: 2px solid var(--border-hover);
    border-radius: var(--radius-md);
    padding: 0.4rem 0.5rem 0.4rem 1rem;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.input-group-main:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.input-icon {
    font-size: 1.25rem;
    margin-right: 0.75rem;
}
.main-url-input {
    flex: 1;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 1.05rem;
    color: var(--text-main);
    background: transparent;
    padding: 0.5rem 0;
}
.main-url-input::placeholder {
    color: var(--text-light);
}
.btn-shorten {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

.advanced-toggle-wrapper {
    margin-top: 1rem;
    text-align: center;
}
.toggle-advanced-btn {
    background: transparent;
    border: none;
    color: var(--secondary);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    transition: all 0.15s ease;
}
.toggle-advanced-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.advanced-panel {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    animation: fadeIn 0.25s ease;
}

/* ==========================================================
   Dynamic Shortening Result Box
   ========================================================== */
.result-box {
    margin-top: 1.5rem;
    padding: 1.5rem;
    background: var(--light-bg);
    border: 1px solid var(--primary-border);
    border-radius: var(--radius-md);
    animation: slideDown 0.3s ease;
}
.result-success-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    color: var(--success);
    font-weight: 700;
    font-size: 0.9rem;
    margin-bottom: 0.75rem;
}
.badge-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 18px;
    height: 18px;
    background: var(--success);
    color: #ffffff;
    border-radius: 50%;
    font-size: 0.7rem;
}
.result-url-container {
    display: flex;
    gap: 0.75rem;
    align-items: center;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.4rem 0.5rem 0.4rem 1rem;
}
.result-url-input {
    flex: 1;
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
    background: transparent;
}
.result-btn-group {
    display: flex;
    gap: 0.4rem;
}

/* Share Section */
.share-section {
    margin-top: 1.25rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}
.share-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}
.share-buttons-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.share-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.4rem 0.75rem;
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    color: #ffffff;
    transition: opacity 0.15s ease;
}
.share-btn:hover { opacity: 0.9; color: #ffffff; }
.share-whatsapp { background-color: #25d366; }
.share-facebook { background-color: #1877f2; }
.share-telegram { background-color: #0088cc; }
.share-twitter { background-color: #000000; }
.share-linkedin { background-color: #0a66c2; }
.share-email { background-color: #64748b; }

/* Result Extras: QR & Social Preview Card */
.result-extras-grid {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 1.25rem;
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px solid var(--border);
}
.qr-result-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
}
.qr-result-card h5 {
    font-size: 0.85rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}
.qr-canvas-container {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 0.5rem;
}
.qr-canvas-container canvas, .qr-canvas-container img {
    max-width: 140px;
    height: auto;
    border-radius: var(--radius-sm);
}

.social-preview-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem;
}
.social-preview-card h5 {
    font-size: 0.85rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
}
.preview-mockup {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--light-bg);
}
.preview-image-box {
    height: 120px;
    background: #e2e8f0;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}
.preview-image-box img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.preview-meta-box {
    padding: 0.75rem;
}
.preview-domain {
    display: block;
    font-size: 0.72rem;
    text-transform: uppercase;
    color: var(--text-light);
    font-weight: 700;
    margin-bottom: 2px;
}
.preview-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 4px;
    line-height: 1.3;
}
.preview-description {
    font-size: 0.8rem;
    color: var(--text-muted);
    line-height: 1.4;
}

/* ==========================================================
   Form Controls & Grids
   ========================================================== */
.form-group {
    margin-bottom: 1.15rem;
}
.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.4rem;
}
.form-control {
    width: 100%;
    font-family: inherit;
    font-size: 0.95rem;
    color: var(--text-main);
    background-color: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0.65rem 0.9rem;
    transition: all 0.15s ease;
}
.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}
.form-control-sm {
    padding: 0.45rem 0.75rem;
    font-size: 0.85rem;
}
.form-control-xs {
    padding: 0.25rem 0.5rem;
    font-size: 0.75rem;
}
.form-grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}
.form-grid-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 1rem;
}
.input-prefix-group {
    display: flex;
    align-items: center;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: #ffffff;
}
.input-prefix {
    padding: 0.65rem 0.75rem;
    background: var(--light-bg);
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 600;
    border-right: 1px solid var(--border);
}
.input-prefix-group .form-control {
    border: none;
    box-shadow: none;
}
.form-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}
.form-label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}
.form-link {
    font-size: 0.82rem;
    font-weight: 600;
}
.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    cursor: pointer;
    user-select: none;
}
.checkbox-row {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    padding-top: 0.4rem;
}
.checkbox-row-stacked {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.section-micro-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}
.section-micro-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 1rem;
}
.form-divider {
    border: 0;
    height: 1px;
    background: var(--border);
    margin: 1.5rem 0;
}

/* ==========================================================
   Features, FAQ & CTA Sections
   ========================================================== */
.features-section {
    padding: 5rem 0;
    background: #ffffff;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}
.section-heading {
    max-width: 650px;
    margin: 0 auto 3rem;
}
.text-center { text-align: center; }
.section-title {
    font-size: 2.1rem;
    font-weight: 800;
    letter-spacing: -0.5px;
    color: var(--dark);
    margin-bottom: 0.5rem;
}
.section-subtitle {
    font-size: 1.05rem;
    color: var(--secondary);
}
.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}
.feature-card {
    padding: 2rem;
    background: var(--light-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
    background: #ffffff;
}
.feature-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
}
.feature-card h3 {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}
.feature-card p {
    font-size: 0.92rem;
    color: var(--secondary);
    line-height: 1.55;
}

.faq-section {
    padding: 5rem 0;
    background: var(--light-bg);
}
.faq-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    max-width: 950px;
    margin: 0 auto;
}
.faq-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.75rem;
}
.faq-card h4 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 0.5rem;
}
.faq-card p {
    font-size: 0.92rem;
    color: var(--secondary);
}

.cta-section {
    padding: 4.5rem 0;
    background: var(--dark);
    color: #ffffff;
}
.cta-section h2 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 0.75rem;
}
.cta-section p {
    font-size: 1.1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 1.75rem;
}
.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ==========================================================
   Public Pages (About, Contact, Privacy, Terms)
   ========================================================== */
.page-container {
    padding: 3.5rem 1.5rem 5rem;
    max-width: 850px;
}
.page-header {
    text-align: center;
    margin-bottom: 2.5rem;
}
.page-title {
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--dark);
    letter-spacing: -0.5px;
}
.page-subtitle {
    font-size: 1.1rem;
    color: var(--secondary);
    margin-top: 0.5rem;
}
.page-content {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    box-shadow: var(--shadow-sm);
}
.legal-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
}
.legal-content h3:first-child { margin-top: 0; }
.legal-content p, .legal-content ul {
    color: var(--secondary);
    font-size: 0.95rem;
    line-height: 1.65;
    margin-bottom: 1rem;
}
.legal-content ul {
    padding-left: 1.5rem;
}

/* ==========================================================
   Auth Layout & Centered Cards
   ========================================================== */
.auth-body {
    background: var(--light-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}
.auth-wrapper {
    width: 100%;
    max-width: 440px;
}
.auth-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2.25rem;
    box-shadow: var(--shadow-xl);
}
.auth-header {
    text-align: center;
    margin-bottom: 1.75rem;
}
.auth-logo {
    justify-content: center;
}
.auth-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.35rem;
}
.auth-subtitle {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-bottom: 1.5rem;
}
.auth-switch {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.875rem;
    color: var(--secondary);
}
.auth-switch-link {
    font-weight: 700;
    margin-left: 0.3rem;
}
.auth-footer {
    text-align: center;
    margin-top: 1.25rem;
    font-size: 0.85rem;
}

/* ==========================================================
   Error Layout
   ========================================================== */
.error-body {
    background: var(--light-bg);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
}
.error-wrapper {
    width: 100%;
    max-width: 500px;
    text-align: center;
}
.error-card {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 3rem 2rem;
    box-shadow: var(--shadow-xl);
}
.error-logo {
    justify-content: center;
    margin-bottom: 1.5rem;
}
.error-status-code {
    font-size: 4rem;
    font-weight: 800;
    color: var(--primary);
    line-height: 1;
    margin-bottom: 1rem;
}
.error-status-title {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.5rem;
}
.error-status-message {
    color: var(--secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}
.error-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
}

/* ==========================================================
   Footer
   ========================================================== */
.site-footer {
    background-color: #ffffff;
    border-top: 1px solid var(--border);
    margin-top: auto;
    padding: 3.5rem 0 2rem;
}
.footer-top {
    display: flex;
    justify-content: space-between;
    gap: 3rem;
    margin-bottom: 2.5rem;
}
.footer-brand {
    max-width: 320px;
}
.footer-tagline {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin-top: 0.75rem;
}
.footer-links {
    display: flex;
    gap: 3.5rem;
}
.footer-col h4 {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 0.85rem;
}
.footer-col a {
    display: block;
    color: var(--secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}
.footer-col a:hover { color: var(--primary); }
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border);
    font-size: 0.85rem;
    color: var(--text-light);
}
.footer-socials {
    display: flex;
    gap: 1rem;
}
.footer-socials a { color: var(--secondary); }
.footer-socials a:hover { color: var(--primary); }

/* ==========================================================
   Keyframes & Animations
   ========================================================== */
@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================
   Admin Auth Box Styling
   ========================================================== */
.admin-auth-box {
    border-top: 4px solid var(--dark);
    background: #ffffff;
}
.admin-shield-header {
    text-align: center;
    margin-bottom: 1.5rem;
}
.shield-badge {
    display: inline-block;
    background: #0f172a;
    color: #f8fafc;
    font-size: 0.72rem;
    font-weight: 800;
    letter-spacing: 1px;
    padding: 4px 10px;
    border-radius: var(--radius-sm);
    margin-bottom: 0.75rem;
    border: 1px solid #334155;
}

/* ==========================================================
   Responsive Breakpoints
   Desktop -> Tablet -> Mobile
   ========================================================== */
@media (max-width: 1024px) {
    .shortener-monetization-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .ad-column-left { order: 2; }
    .shortener-box-wrapper { order: 1; }
    .ad-column-right { order: 3; }
    .features-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
    .header-inner { height: 60px; }
    .nav-toggle { display: flex; }
    .nav-menu {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        align-items: stretch;
        padding: 1.5rem;
        gap: 0.75rem;
        display: none;
        box-shadow: var(--shadow-xl);
        z-index: 999;
    }
    .nav-menu.open { display: flex; }
    .nav-menu .btn { width: 100%; text-align: center; }
    .hero-section { padding: 2.5rem 0 3rem; }
    .hero-title { font-size: 1.95rem; }
    .hero-subtitle { font-size: 0.98rem; }
    .shortener-card { padding: 1.25rem; }
    .input-group-main { flex-direction: column; gap: 0.75rem; padding: 0.75rem; }
    .btn-shorten { width: 100%; }
    .form-grid-2, .form-grid-3, .features-grid, .faq-grid { grid-template-columns: 1fr; }
    .result-extras-grid { grid-template-columns: 1fr; }
    .footer-top { flex-direction: column; gap: 2rem; }
    .footer-links { flex-wrap: wrap; gap: 2rem; }
    .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
}

@media (max-width: 540px) {
    .result-url-container {
        flex-direction: column;
        align-items: stretch;
        gap: 0.65rem;
        padding: 0.75rem;
    }
    .result-url-input {
        font-size: 0.95rem;
        width: 100%;
    }
    .result-btn-group {
        width: 100%;
        display: flex;
        gap: 0.5rem;
    }
    .result-btn-group .btn {
        flex: 1;
        justify-content: center;
    }
    .share-buttons-grid {
        display: grid;
        grid-template-columns: 1fr 1fr;
        gap: 0.4rem;
    }
    .share-btn {
        justify-content: center;
    }
    .hero-title { font-size: 1.7rem; }
    .page-title { font-size: 1.8rem; }
    .cta-section h2 { font-size: 1.6rem; }
}