/*
 * landing.css
 * -----------
 * Externalized verbatim from the inline <style> block in
 * app/templates/index.html to satisfy a strict Content-Security-Policy
 * (style-src 'self', no 'unsafe-inline'). Styles the public landing / login
 * page. Behavior and cascade order are unchanged.
 */
:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #a855f7;
    --background-color: #0f172a;
    --surface-color: #1e293b;
    --surface-hover: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: #334155;
    --error-color: #ef4444;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --shadow-color: rgba(0, 0, 0, 0.3);
}

.light {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #a855f7;
    --background-color: #f8fafc;
    --surface-color: #ffffff;
    --surface-hover: #f1f5f9;
    --text-primary: #1e293b;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #e2e8f0;
    --error-color: #ef4444;
    --success-color: #22c55e;
    --warning-color: #f59e0b;
    --shadow-color: rgba(0, 0, 0, 0.1);
}

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

/* Accessibility: keyboard skip-link to the main content. Visually hidden until
   focused, then revealed at the top-left. */
.skip-link {
    position: absolute;
    top: 0;
    left: 0;
    z-index: 1000;
    padding: 0.5rem 1rem;
    background: var(--primary-color);
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    border-radius: 0 0 0.5rem 0;
    transform: translateY(-150%);
    transition: transform 0.2s;
}

.skip-link:focus {
    transform: translateY(0);
    outline: 2px solid #ffffff;
    outline-offset: 2px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: linear-gradient(135deg, var(--background-color) 0%, #1a1a2e 50%, var(--background-color) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

/* Header */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(30, 41, 59, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    text-decoration: none;
}

.logo img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

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

.nav-links .nav-cta {
    color: white;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    padding: 0.5rem 0.875rem;
    border-radius: 0.5rem;
}

.nav-links .nav-cta:hover {
    color: white;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 6rem 2rem 4rem;
    text-align: center;
}

.hero {
    max-width: 800px;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-color) 50%, var(--accent-color) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero p {
    font-size: 1.25rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 2rem;
}

/* Auth Container */
.auth-container {
    background: var(--surface-color);
    border-radius: 1rem;
    padding: 2.5rem;
    width: 100%;
    max-width: 420px;
    border: 1px solid var(--border-color);
    box-shadow: 0 25px 50px -12px var(--shadow-color);
}

.auth-tabs {
    display: flex;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--border-color);
}

.auth-tab {
    flex: 1;
    padding: 1rem;
    background: none;
    border: none;
    color: var(--text-muted);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    position: relative;
}

.auth-tab.active {
    color: var(--primary-color);
}

.auth-tab.active::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-copy {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.auth-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.auth-note {
    color: var(--text-muted);
    font-size: 0.875rem;
    line-height: 1.5;
    margin-top: 1rem;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: 0.875rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--background-color);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

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

.btn {
    width: 100%;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 25px -5px rgba(99, 102, 241, 0.4);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: var(--surface-hover);
    color: var(--text-primary);
    margin-top: 0.75rem;
}

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

.divider {
    display: flex;
    align-items: center;
    margin: 1.5rem 0;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.divider span {
    padding: 0 1rem;
}

.forgot-password {
    text-align: right;
    margin-top: 0.5rem;
}

.forgot-password a {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.875rem;
}

.forgot-password a:hover {
    text-decoration: underline;
}

/* Features Section */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    max-width: 1000px;
    margin-top: 4rem;
    padding: 0 1rem;
}

.feature-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    text-align: left;
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 40px -15px var(--shadow-color);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

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

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

/* Footer */
.footer {
    padding: 1.5rem 2rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
}

/* Toast Messages */
.toast-container {
    position: fixed;
    top: 5rem;
    right: 1rem;
    z-index: 200;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.toast {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    box-shadow: 0 10px 25px -5px var(--shadow-color);
    animation: slideIn 0.3s ease;
}

.toast.error {
    border-color: var(--error-color);
}

.toast.success {
    border-color: var(--success-color);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Responsive */
@media (max-width: 768px) {
    .header {
        padding: 1rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .auth-container {
        padding: 1.5rem;
        margin: 0 1rem;
    }

    .features {
        grid-template-columns: 1fr;
    }
}

/* Loading Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

/* CSP-safe replacement for the theme toggle button's former inline style */
.theme-toggle-btn {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 8px;
    cursor: pointer;
    color: var(--text-primary);
}