/* ============================================
   QUICKINVOICE - Main Shared Styles
   Fidbacc-style UI with Purple Brand Colors
   ============================================ */

:root {
    /* Brand Colors - Purple Gradient */
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --primary-gradient-light: linear-gradient(135deg, #818cf8 0%, #a855f7 100%);
    --success-gradient: linear-gradient(135deg, #10b981 0%, #059669 100%);
    --danger-gradient: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);

    /* Solid Colors */
    --primary-color: #667eea;
    --primary-dark: #5a67d8;
    --primary-light: #818cf8;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;

    /* Text Colors */
    --text-primary: #1a1f36;
    --text-secondary: #4a5568;
    --text-muted: #6b7280;
    --text-light: #9ca3af;

    /* Border & Background */
    --border-color: #e2e8f0;
    --border-light: #f1f5f9;
    --bg-light: #f8f9fa;
    --bg-page: #f0f2f5;
    --bg-white: #ffffff;

    /* Shadows - Fidbacc Style */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.02);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.01);
    --shadow-2xl: 0 25px 50px -12px rgba(0, 0, 0, 0.15);

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-3xl: 32px;

    /* Transitions */
    --transition-fast: all 0.2s ease;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s ease;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-page);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: 3.5rem; }
h2 { font-size: 2.5rem; margin-bottom: 1rem; }
h3 { font-size: 1.5rem; margin-bottom: 0.75rem; }
h4 { font-size: 1.25rem; margin-bottom: 0.5rem; }

p {
    color: var(--text-secondary);
    line-height: 1.6;
}

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

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

/* Section Headers - Fidbacc Style */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-header h2 {
    margin-bottom: var(--spacing-sm);
}

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

/* Gradient Text */
.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* Buttons - Fidbacc Style */
.btn-primary, .btn-outline, .btn-large, .btn-large-outline {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

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

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--primary-color);
    color: var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    background: var(--primary-gradient);
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1rem;
}

.btn-large-outline {
    background: transparent;
    border: 2px solid white;
    color: white;
    padding: var(--spacing-lg) var(--spacing-2xl);
    font-size: 1rem;
}

.btn-large-outline:hover {
    background: white;
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* Cards - Fidbacc Style */
.card {
    background: var(--bg-white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border-light);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.card-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--bg-light);
}

.card-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.card-header h3 {
    font-size: 1.25rem;
    margin-bottom: 0;
}

/* Form Styles */
.form-group {
    margin-bottom: var(--spacing-lg);
}

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

.form-group label i {
    margin-right: var(--spacing-xs);
    color: var(--primary-color);
    font-size: 0.75rem;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 1.5px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-family: 'Inter', sans-serif;
    transition: var(--transition-fast);
    background: var(--bg-white);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-group input:hover,
.form-group textarea:hover {
    border-color: var(--primary-light);
}

.row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-lg);
}

/* App Navigation */
.app-nav {
    background: var(--bg-white);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-light);
    box-shadow: var(--shadow-xs);
}

.app-nav .nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-xl);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: var(--primary-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.logo h2 {
    font-size: 1.25rem;
    margin-bottom: 0;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xs);
    background: var(--bg-light);
    padding: 0.25rem;
    border-radius: var(--radius-md);
}

.nav-link {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: transparent;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    text-decoration: none;
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(102, 126, 234, 0.05);
}

.nav-link.active {
    background: var(--bg-white);
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
}

.user-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    background: var(--bg-light);
    padding: 0.25rem 0.5rem 0.25rem var(--spacing-lg);
    border-radius: 40px;
}

.user-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
}

.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.badge.pro {
    background: var(--success-gradient);
    color: white;
}

.badge.free {
    background: var(--text-muted);
    color: white;
}

.btn-logout {
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1rem;
    transition: var(--transition-fast);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}

.btn-logout:hover {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

/* Action Buttons */
.btn-save, .btn-pdf, .btn-whatsapp {
    flex: 1;
    padding: var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    font-weight: 600;
    font-size: 0.875rem;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

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

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

.btn-whatsapp {
    background: #25D366;
    color: white;
}

.btn-save:hover, .btn-pdf:hover, .btn-whatsapp:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-buttons {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* Messages */
.message {
    margin-top: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: none;
    animation: slideIn 0.3s ease-out;
}

.message.show {
    display: block;
}

.message.success {
    background: #d1fae5;
    color: #065f46;
    border-left: 4px solid var(--success-color);
}

.message.error {
    background: #fee2e2;
    color: #991b1b;
    border-left: 4px solid var(--danger-color);
}

.message.info {
    background: #e0f2fe;
    color: #075985;
    border-left: 4px solid var(--primary-color);
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Loading Spinner */
.loading-spinner {
    display: inline-block;
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
    margin: var(--spacing-2xl) auto;
}

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

/* Modal - Fidbacc Style */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(8px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--bg-white);
    border-radius: var(--radius-2xl);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: fadeInUp 0.3s ease-out;
    box-shadow: var(--shadow-2xl);
}

.modal-large {
    max-width: 1000px;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) var(--spacing-xl);
    border-bottom: 1px solid var(--border-light);
}

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

.modal-close:hover {
    color: var(--danger-color);
}

.modal-actions {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-lg) var(--spacing-xl);
    border-top: 1px solid var(--border-light);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Footer */
.footer {
    background: #1a1f36;
    color: white;
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
    margin-top: var(--spacing-4xl);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-2xl);
}

.footer-logo .logo-icon {
    margin-bottom: var(--spacing-md);
}

.footer-logo h3 {
    color: white;
    margin-bottom: var(--spacing-sm);
}

.footer-logo p {
    color: var(--text-light);
    font-size: 0.875rem;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.link-group h4 {
    color: white;
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
}

.link-group a {
    display: block;
    color: var(--text-light);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

.link-group a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    padding-top: var(--spacing-xl);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-bottom p {
    color: var(--text-light);
    font-size: 0.75rem;
}

.country-badges {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.country-badges span {
    font-size: 0.75rem;
    color: var(--text-light);
}

/* Responsive */
@media (max-width: 1024px) {
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-xl);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-lg);
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }

    .app-nav .nav-container {
        flex-direction: column;
    }

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

    .action-buttons {
        flex-direction: column;
    }

    .modal-content {
        width: 95%;
        margin: var(--spacing-md);
    }

    .footer-links {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}