/* =====================================================
   CHATIFY IT - Main Stylesheet
   White backgrounds with emerald green accents
   ===================================================== */

/* =====================================================
   CSS VARIABLES (Design Tokens)
   ===================================================== */

:root {
    /* Brand Colors */
    --brand-primary: #10b981;        /* Emerald Green - buttons, accents */
    --brand-primary-dark: #059669;   /* Darker Green - hover states */
    --brand-primary-light: #d1fae5;  /* Light Green - backgrounds */
    --brand-secondary: #1e3a5f;      /* Navy Blue - headings, main text */
    --brand-secondary-light: #2d5a8f;
    
    /* Neutral Colors */
    --color-white: #ffffff;
    --color-black: #000000;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Text Colors */
    --text-primary: #1e3a5f;      /* Navy for headings */
    --text-secondary: #64748b;    /* Gray for body text */
    --text-muted: #9ca3af;
    
    /* Semantic Colors */
    --color-success: #10b981;
    --color-success-light: #d1fae5;
    --color-success-dark: #065f46;
    --color-error: #ef4444;
    --color-error-light: #fee2e2;
    --color-error-dark: #991b1b;
    --color-warning: #f59e0b;
    --color-warning-light: #fef3c7;
    --color-warning-dark: #92400e;
    --color-info: #3b82f6;
    --color-info-light: #dbeafe;
    --color-info-dark: #1e3a8a;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-family-mono: 'Courier New', Courier, monospace;
    
    /* Font Sizes */
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 15px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 30px;
    --font-size-4xl: 36px;
    --font-size-5xl: 48px;
    
    /* Font Weights */
    --font-weight-normal: 400;
    --font-weight-medium: 500;
    --font-weight-semibold: 600;
    --font-weight-bold: 700;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 20px;
    --spacing-2xl: 24px;
    --spacing-3xl: 32px;
    --spacing-4xl: 40px;
    --spacing-5xl: 48px;
    --spacing-6xl: 64px;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 20px;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 4px 12px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 8px 24px rgba(0, 0, 0, 0.15);
    --shadow-2xl: 0 20px 60px rgba(0, 0, 0, 0.25);
    
    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* =====================================================
   GLOBAL RESETS
   ===================================================== */

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

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--text-secondary);
    background-color: var(--color-white);
}

/* =====================================================
   TYPOGRAPHY
   ===================================================== */

h1, h2, h3, h4, h5, h6 {
    font-weight: var(--font-weight-bold);
    line-height: 1.2;
    color: var(--text-primary);
    margin-bottom: var(--spacing-lg);
}

h1 { font-size: var(--font-size-5xl); }
h2 { font-size: var(--font-size-4xl); }
h3 { font-size: var(--font-size-3xl); }
h4 { font-size: var(--font-size-2xl); }
h5 { font-size: var(--font-size-xl); }
h6 { font-size: var(--font-size-lg); }

p {
    margin-bottom: var(--spacing-lg);
    color: var(--text-secondary);
}

a {
    color: var(--brand-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--brand-primary-dark);
    text-decoration: underline;
}

/* =====================================================
   BRAND COMPONENTS
   ===================================================== */

.brand-logo {
    font-size: var(--font-size-3xl);
    font-weight: var(--font-weight-bold);
    color: var(--brand-secondary);
    text-decoration: none;
}

.brand-logo:hover {
    text-decoration: none;
}

.brand-logo .brand-it {
    color: var(--brand-primary);
}

/* =====================================================
   LAYOUT CONTAINERS
   ===================================================== */

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.container-sm {
    max-width: 640px;
}

.container-md {
    max-width: 900px;
}

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

/* =====================================================
   CARDS
   ===================================================== */

.card {
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-3xl);
    border: 1px solid var(--color-gray-200);
}

.card-header {
    padding-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--color-gray-100);
    margin-bottom: var(--spacing-xl);
}

.card-title {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--text-primary);
    margin: 0;
}

.card-body {
    padding: var(--spacing-xl) 0;
}

.card-footer {
    padding-top: var(--spacing-xl);
    border-top: 2px solid var(--color-gray-100);
    margin-top: var(--spacing-xl);
}

/* =====================================================
   BUTTONS
   ===================================================== */

.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    text-align: center;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-base);
    text-decoration: none;
    line-height: 1.5;
}

.btn:hover {
    text-decoration: none;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

/* Button Variants */
.btn-primary {
    background: var(--brand-primary);
    color: var(--color-white);
}

.btn-primary:hover:not(:disabled) {
    background: var(--brand-primary-dark);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--brand-secondary-light);
    box-shadow: 0 4px 12px rgba(30, 58, 95, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--brand-primary);
    border: 2px solid var(--brand-primary);
}

.btn-outline:hover:not(:disabled) {
    background: var(--brand-primary);
    color: var(--color-white);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-gray-100);
}

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

.btn-danger:hover:not(:disabled) {
    background: #dc2626;
}

/* Button Sizes */
.btn-sm {
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: var(--font-size-sm);
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-3xl);
    font-size: var(--font-size-lg);
}

.btn-block {
    width: 100%;
    display: block;
}

/* =====================================================
   FORM ELEMENTS
   ===================================================== */

.form-group {
    margin-bottom: var(--spacing-xl);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--text-primary);
    font-size: var(--font-size-sm);
}

.form-input,
.form-textarea,
.form-select {
    width: 100%;
    padding: var(--spacing-md);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    border: 2px solid var(--color-gray-300);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
    background: var(--color-white);
    color: var(--text-primary);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.1);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-input:disabled,
.form-textarea:disabled,
.form-select:disabled {
    background: var(--color-gray-100);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-helper {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--text-muted);
}

.form-error {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-error);
}

/* Checkbox & Radio */
.form-checkbox,
.form-radio {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--brand-primary);
}

/* =====================================================
   ALERTS & MESSAGES
   ===================================================== */

.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xl);
    border: 1px solid transparent;
}

.alert-success {
    background: var(--color-success-light);
    border-color: #a7f3d0;
    color: var(--color-success-dark);
}

.alert-error {
    background: var(--color-error-light);
    border-color: #fecaca;
    color: var(--color-error-dark);
}

.alert-warning {
    background: var(--color-warning-light);
    border-color: #fde68a;
    color: var(--color-warning-dark);
}

.alert-info {
    background: var(--color-info-light);
    border-color: #bfdbfe;
    color: var(--color-info-dark);
}

/* =====================================================
   BADGES
   ===================================================== */

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.badge-primary {
    background: var(--brand-primary);
    color: var(--color-white);
}

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

.badge-warning {
    background: var(--color-warning);
    color: var(--color-white);
}

.badge-info {
    background: var(--color-info);
    color: var(--color-white);
}

.badge-gray {
    background: var(--color-gray-200);
    color: var(--color-gray-700);
}

/* =====================================================
   AUTH PAGES (Login/Signup)
   ===================================================== */

.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: var(--color-gray-50);
}

.auth-card {
    background: var(--color-white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: var(--spacing-5xl) var(--spacing-4xl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.auth-header h1 {
    margin-bottom: var(--spacing-sm);
}

.auth-header p {
    color: var(--text-secondary);
    font-size: var(--font-size-sm);
    margin-bottom: 0;
}

.divider {
    text-align: center;
    margin: var(--spacing-2xl) 0;
    position: relative;
    color: var(--text-muted);
    font-size: var(--font-size-sm);
}

.divider::before,
.divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 40%;
    height: 1px;
    background: var(--color-gray-300);
}

.divider::before { left: 0; }
.divider::after { right: 0; }

.auth-links {
    text-align: center;
    margin-top: var(--spacing-2xl);
    font-size: var(--font-size-sm);
    color: var(--text-secondary);
}

.trial-badge {
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-primary-dark));
    color: var(--color-white);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-semibold);
    display: inline-block;
    margin-bottom: var(--spacing-xl);
}

/* =====================================================
   UTILITY CLASSES
   ===================================================== */

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--text-primary); }
.text-secondary { color: var(--text-secondary); }
.text-muted { color: var(--text-muted); }
.text-success { color: var(--color-success); }
.text-error { color: var(--color-error); }
.text-warning { color: var(--color-warning); }

.font-bold { font-weight: var(--font-weight-bold); }
.font-semibold { font-weight: var(--font-weight-semibold); }
.font-medium { font-weight: var(--font-weight-medium); }

.mb-0 { margin-bottom: 0 !important; }
.mt-2 { margin-top: var(--spacing-2xl); }
.mb-2 { margin-bottom: var(--spacing-2xl); }

/* =====================================================
   RESPONSIVE
   ===================================================== */

@media (max-width: 768px) {
    :root {
        --font-size-5xl: 36px;
        --font-size-4xl: 28px;
        --font-size-3xl: 24px;
    }
    
    .card {
        padding: var(--spacing-2xl);
    }
    
    .auth-card {
        padding: var(--spacing-3xl) var(--spacing-2xl);
    }
}