/* Voice2VoiceSim — Global Styles
   Modern SaaS: bold gradients, rounded cards, Inter font, clean typography */

/* ---------- Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* ---------- CSS Variables ---------- */
:root {
    --primary: #4F46E5;
    --primary-dark: #3730A3;
    --primary-light: #818CF8;
    --secondary: #06B6D4;
    --secondary-dark: #0891B2;
    --accent: #F59E0B;

    --bg-dark: #0F172A;
    --bg-medium: #1E293B;
    --bg-light: #F8FAFC;
    --bg-white: #FFFFFF;

    --text-primary: #0F172A;
    --text-secondary: #475569;
    --text-muted: #94A3B8;
    --text-white: #F8FAFC;

    --border: #E2E8F0;
    --border-light: #F1F5F9;

    --success: #10B981;
    --warning: #F59E0B;
    --error: #EF4444;
    --info: #3B82F6;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -2px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -4px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 8px 10px -6px rgba(0, 0, 0, 0.1);

    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;

    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ---------- Typography ---------- */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    color: var(--text-primary);
}

h1 { font-size: 2.25rem; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p { margin-bottom: 1rem; }

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover { color: var(--primary-dark); }

/* ---------- Layout ---------- */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

.container-narrow {
    max-width: 720px;
}

.container-wide {
    max-width: 1400px;
}

main {
    flex: 1;
    padding: 2rem 0;
}

/* ---------- Navigation ---------- */
.nav {
    background: var(--bg-white);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.9rem;
    transition: color 0.2s;
}

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

/* ---------- Cards ---------- */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    transition: box-shadow 0.2s, transform 0.2s;
}

.card:hover {
    box-shadow: var(--shadow-lg);
}

.card-clickable {
    cursor: pointer;
}

.card-clickable:hover {
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
}

.card-subtitle {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1.25rem;
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 0.9rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    line-height: 1.4;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover:not(:disabled) {
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-light);
    border-color: var(--primary-light);
}

/* Ensure btn-secondary text is always dark, even inside hero (dark background) */
.hero .btn-secondary {
    color: var(--text-primary);
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-danger {
    background: var(--error);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background: #DC2626;
}

.btn-success {
    background: var(--success);
    color: white;
}

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

.form-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.375rem;
}

.form-input {
    width: 100%;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: var(--font);
    font-size: 0.9rem;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: var(--bg-white);
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

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

textarea.form-input {
    resize: vertical;
    min-height: 200px;
    line-height: 1.6;
}

/* ---------- Alerts ---------- */
.alert {
    padding: 0.875rem 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.alert-error {
    background: #FEF2F2;
    color: #991B1B;
    border: 1px solid #FECACA;
}

.alert-success {
    background: #F0FDF4;
    color: #166534;
    border: 1px solid #BBF7D0;
}

.alert-info {
    background: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

.alert-warning {
    background: #FFFBEB;
    color: #92400E;
    border: 1px solid #FDE68A;
}

/* ---------- Rating Badges ---------- */
.rating-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: capitalize;
}

.rating-proficient {
    background: #ECFDF5;
    color: #065F46;
    border: 1px solid #A7F3D0;
}

.rating-competent {
    background: #EFF6FF;
    color: #1E40AF;
    border: 1px solid #BFDBFE;
}

.rating-developing {
    background: #FFFBEB;
    color: #92400E;
    border: 1px solid #FDE68A;
}

.rating-beginning {
    background: #FFF7ED;
    color: #9A3412;
    border: 1px solid #FED7AA;
}

/* ---------- Section Headers ---------- */
.section-header {
    margin-bottom: 1.5rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
}

.section-subtitle {
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* ---------- Grid ---------- */
.grid {
    display: grid;
    gap: 1.5rem;
}

.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }

@media (max-width: 768px) {
    .grid-2, .grid-3 { grid-template-columns: 1fr; }
}

/* ---------- Hero (Landing Page) ---------- */
.hero {
    background: linear-gradient(135deg, var(--bg-dark), var(--bg-medium));
    color: var(--text-white);
    padding: 4rem 0;
    text-align: center;
}

.hero h1 {
    color: var(--text-white);
    font-size: 2.75rem;
    font-weight: 800;
    margin-bottom: 1rem;
}

.hero p {
    color: var(--text-muted);
    font-size: 1.125rem;
    max-width: 600px;
    margin: 0 auto 2rem;
}

.hero-gradient-text {
    background: linear-gradient(135deg, var(--primary-light), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--bg-dark);
    color: var(--text-muted);
    padding: 2rem 0;
    margin-top: auto;
}

.footer a {
    color: var(--text-muted);
}

.footer a:hover {
    color: var(--text-white);
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.875rem;
}

/* ---------- Divider ---------- */
.divider {
    border: none;
    border-top: 1px solid var(--border);
    margin: 1.5rem 0;
}

/* ---------- Utility Classes ---------- */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-small { font-size: 0.875rem; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }

/* ---------- Phone Block Message ---------- */
.phone-block-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: var(--bg-dark);
    color: var(--text-white);
    z-index: 10000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 2rem;
}

.phone-block-overlay h2 {
    color: var(--text-white);
    margin-bottom: 1rem;
}

.phone-block-overlay p {
    color: var(--text-muted);
    max-width: 400px;
}

/* ---------- Loading Spinner ---------- */
.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.loading-overlay {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    padding: 3rem;
    color: var(--text-secondary);
}

/* ---------- Checkmark Icon (CSS only) ---------- */
.checkmark {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.25rem;
    height: 1.25rem;
    background: var(--success);
    border-radius: 50%;
    color: white;
    font-size: 0.7rem;
    font-weight: bold;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    .hero h1 { font-size: 2rem; }
    .hero { padding: 3rem 0; }
}