/**
 * Shortner — Clean modern UI, no template engine. Bootstrap 5 + custom.
 */

:root {
    --shortner-font: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
    --shortner-primary: #0f766e;
    --shortner-primary-light: #14b8a6;
    --shortner-primary-hover: #0d9488;
    --shortner-bg: #f0fdfa;
    --shortner-bg-alt: #ccfbf1;
    --shortner-card-bg: #ffffff;
    --shortner-card-shadow: 0 1px 3px rgba(15, 118, 110, 0.08), 0 6px 20px rgba(15, 118, 110, 0.06);
    --shortner-card-shadow-hover: 0 8px 24px rgba(15, 118, 110, 0.12), 0 2px 8px rgba(0, 0, 0, 0.04);
    --shortner-radius: 14px;
    --shortner-radius-lg: 20px;
    --shortner-transition: 0.2s ease;
    --shortner-text: #134e4a;
    --shortner-text-muted: #0f766e;
}

* {
    box-sizing: border-box;
}

body {
    font-family: var(--shortner-font);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--shortner-text);
    background: linear-gradient(180deg, var(--shortner-bg) 0%, #e0f2f1 50%, #f0fdfa 100%);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Navbar */
.navbar {
    background: rgba(255, 255, 255, 0.92) !important;
    backdrop-filter: blur(12px);
    box-shadow: 0 1px 0 rgba(15, 118, 110, 0.1);
    padding: 0.75rem 0;
}
.navbar-brand {
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--shortner-primary) !important;
    letter-spacing: -0.03em;
}
.navbar-brand:hover {
    color: var(--shortner-primary-hover) !important;
}
.nav-link {
    font-weight: 500;
    color: var(--shortner-text-muted) !important;
}
.nav-link:hover {
    color: var(--shortner-primary) !important;
}
.navbar .btn-primary {
    font-weight: 600;
    border-radius: 10px;
    padding: 0.4rem 1rem;
}
.navbar .btn-outline-primary {
    border-radius: 10px;
    padding: 0.4rem 1rem;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, var(--shortner-primary) 0%, var(--shortner-primary-light) 100%);
    border: none;
    font-weight: 600;
    border-radius: 12px;
    padding: 0.6rem 1.25rem;
    transition: transform 0.15s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 14px rgba(15, 118, 110, 0.35);
}
.btn-primary:hover {
    background: linear-gradient(135deg, var(--shortner-primary-hover) 0%, var(--shortner-primary) 100%);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(15, 118, 110, 0.4);
}
.btn-outline-primary {
    color: var(--shortner-primary);
    border: 2px solid var(--shortner-primary);
    font-weight: 600;
    border-radius: 12px;
}
.btn-outline-primary:hover {
    background: var(--shortner-primary);
    border-color: var(--shortner-primary);
    color: #fff;
}

/* Auth pages */
.auth-page {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    min-height: 70vh;
}
.auth-card {
    width: 100%;
    max-width: 440px;
    border-radius: var(--shortner-radius-lg);
    overflow: hidden;
    box-shadow: var(--shortner-card-shadow);
    background: var(--shortner-card-bg);
    border: 1px solid rgba(15, 118, 110, 0.1);
    animation: cardFadeIn 0.45s ease;
}
@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.auth-card .card-body {
    padding: 2.25rem 2rem;
}
.auth-title {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--shortner-primary);
    letter-spacing: -0.03em;
}
.auth-form .form-control {
    border-radius: 10px;
    border: 1px solid rgba(15, 118, 110, 0.2);
    padding: 0.65rem 1rem;
}
.auth-form .form-control:focus {
    border-color: var(--shortner-primary);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.2);
}
.auth-form .form-label {
    font-weight: 600;
    color: var(--shortner-text);
}

/* Landing */
.landing-page .landing-main {
    flex: 1;
    display: flex;
    align-items: center;
    padding: 3rem 0;
}
.landing-hero {
    text-align: center;
    max-width: 640px;
    margin: 0 auto;
}
.landing-title {
    font-size: clamp(2.25rem, 6vw, 3.5rem);
    font-weight: 800;
    color: var(--shortner-primary);
    letter-spacing: -0.04em;
    line-height: 1.15;
    margin-bottom: 1.25rem;
}
.landing-lead {
    font-size: 1.2rem;
    color: var(--shortner-text-muted);
    margin-bottom: 2rem;
    line-height: 1.65;
}
.landing-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: center;
    margin-bottom: 2rem;
}
.landing-badges .badge {
    background: rgba(15, 118, 110, 0.12);
    color: var(--shortner-primary);
    font-weight: 600;
    padding: 0.5rem 1rem;
    border-radius: 999px;
}
.landing-cta .btn {
    border-radius: 12px;
    padding: 0.75rem 1.75rem;
    font-weight: 600;
}
.landing-cta .btn-lg {
    padding: 0.85rem 2rem;
}

/* Dashboard */
.dashboard-main {
    flex: 1;
    padding: 2rem 0 3rem;
}
.dashboard-header h1 {
    color: var(--shortner-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}
.dashboard-header .text-muted {
    color: var(--shortner-text-muted) !important;
}
.shorten-card {
    border-radius: var(--shortner-radius-lg);
    box-shadow: var(--shortner-card-shadow);
    border: 1px solid rgba(15, 118, 110, 0.08);
    overflow: hidden;
    transition: box-shadow var(--shortner-transition), transform 0.2s ease;
}
.shorten-card:hover {
    box-shadow: var(--shortner-card-shadow-hover);
}
.shorten-card .card-body {
    padding: 1.75rem;
}
.shorten-card .form-control {
    border-radius: 10px;
    border: 1px solid rgba(15, 118, 110, 0.2);
}
.shorten-card .form-control:focus {
    border-color: var(--shortner-primary);
    box-shadow: 0 0 0 3px rgba(15, 118, 110, 0.15);
}
.link-card {
    border-radius: var(--shortner-radius);
    box-shadow: var(--shortner-card-shadow);
    border: 1px solid rgba(15, 118, 110, 0.06);
    transition: box-shadow var(--shortner-transition), border-color 0.2s ease;
}
.link-card:hover {
    box-shadow: var(--shortner-card-shadow-hover);
    border-color: rgba(15, 118, 110, 0.12);
}
.link-card .short-url {
    color: var(--shortner-primary);
    font-weight: 600;
}
.link-card .short-url:hover {
    color: var(--shortner-primary-hover);
    text-decoration: underline !important;
}
.link-card .target-url {
    max-width: 100%;
    color: var(--shortner-text-muted);
}
.empty-links {
    border-radius: var(--shortner-radius-lg);
    background: rgba(255, 255, 255, 0.8);
    border: 1px dashed rgba(15, 118, 110, 0.2);
}
.empty-links .card-body {
    padding: 3rem 2rem;
}

/* Preview page */
.preview-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(160deg, var(--shortner-bg-alt) 0%, var(--shortner-bg) 50%, #e0f2f1 100%);
}
.preview-wrapper {
    width: 100%;
    max-width: 460px;
}
.preview-card {
    border-radius: var(--shortner-radius-lg);
    overflow: hidden;
    box-shadow: var(--shortner-card-shadow-hover);
    border: 1px solid rgba(15, 118, 110, 0.1);
    background: var(--shortner-card-bg);
    animation: cardFadeIn 0.5s ease;
}
.preview-card .card-body {
    padding: 2.5rem 2rem;
}
.preview-icon {
    color: var(--shortner-primary);
    opacity: 0.95;
}
.preview-target-url {
    word-break: break-all;
    font-size: 0.9rem;
    color: var(--shortner-text-muted);
}
#countdown {
    font-weight: 700;
    color: var(--shortner-primary);
    font-size: 1.1rem;
}

/* Error / 404 */
.error-main .display-4 {
    color: var(--shortner-primary);
    font-weight: 700;
}
.error-main .text-muted {
    color: var(--shortner-text-muted) !important;
}

/* Footer */
.app-footer {
    border-top: 1px solid rgba(15, 118, 110, 0.1);
    background: rgba(255, 255, 255, 0.9);
    margin-top: auto;
}

/* Edit row animation */
.edit-row {
    animation: slideDown 0.25s ease;
}
@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-6px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Section labels */
.links-section .h6.text-uppercase,
.shorten-card .h6.text-uppercase {
    color: var(--shortner-primary) !important;
    font-weight: 700;
    letter-spacing: 0.05em;
}

/* Responsive */
@media (min-width: 768px) {
    .auth-card .card-body {
        padding: 2.5rem 2.75rem !important;
    }
    .link-card .card-body {
        padding: 1.35rem 1.5rem !important;
    }
    .landing-main {
        padding: 4rem 0 !important;
    }
}