/* LetZTalk - Global Styles */
/* Main stylesheet for all pages */

:root {
    --primary-color: #6366f1;
    --secondary-color: #8b5cf6;
    --success-color: #10b981;
    --danger-color: #ef4444;
    --warning-color: #f59e0b;
    --info-color: #3b82f6;
    --light-bg: #f9fafb;
    --dark-bg: #1f2937;
    --border-color: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #6b7280;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    font-size: 1rem;
    line-height: 1.5;
    color: var(--text-primary);
    background-color: #ffffff;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.2;
    margin-bottom: 0.5rem;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.5rem;
}

h3 {
    font-size: 1.25rem;
}

h4 {
    font-size: 1.125rem;
}

h5 {
    font-size: 1rem;
}

h6 {
    font-size: 0.875rem;
}

p {
    margin-bottom: 1rem;
}

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

a:hover {
    color: var(--secondary-color);
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    white-space: nowrap;
    user-select: none;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

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

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

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

.btn-success:hover {
    opacity: 0.9;
}

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

.btn-danger:hover {
    opacity: 0.9;
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Form Elements */
input,
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.2s ease;
    background-color: #ffffff;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

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

input::placeholder {
    color: var(--text-secondary);
}

/* Form Groups */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.form-group .help-text {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

/* Cards */
.card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 0.75rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

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

.card-header {
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 1rem;
    padding-bottom: 1rem;
}

.card-body {
    margin: 1rem 0;
}

.card-footer {
    border-top: 1px solid var(--border-color);
    margin-top: 1rem;
    padding-top: 1rem;
}

/* Alerts */
.alert {
    padding: 1rem;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border-left-color: var(--success-color);
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border-left-color: var(--danger-color);
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border-left-color: var(--warning-color);
}

.alert-info {
    background-color: #dbeafe;
    color: #0c2d6b;
    border-left-color: var(--info-color);
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

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

.container-md {
    max-width: 768px;
}

.container-lg {
    max-width: 1024px;
}

/* Grid */
.row {
    display: flex;
    gap: 1rem;
    margin: -0.5rem;
    flex-wrap: wrap;
}

.col {
    flex: 1 1 0;
    padding: 0.5rem;
    min-width: 0;
}

.col-1 { flex: 0 0 8.333%; }
.col-2 { flex: 0 0 16.667%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.667%; }
.col-12 { flex: 0 0 100%; }

/* Spacing */
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

/* Text Utilities */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

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

.text-sm { font-size: 0.875rem; }
.text-lg { font-size: 1.125rem; }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }

/* Backgrounds */
.bg-primary { background-color: var(--primary-color); color: white; }
.bg-secondary { background-color: var(--secondary-color); color: white; }
.bg-light { background-color: var(--light-bg); }
.bg-dark { background-color: var(--dark-bg); color: white; }

/* Display */
.d-none { display: none; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-flex { display: flex; }

.flex-center {
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-primary {
    background-color: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
}

.badge-success {
    background-color: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

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

/* Tables */
table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1rem;
}

th {
    background-color: var(--light-bg);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    border-bottom: 1px solid var(--border-color);
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}

tr:hover {
    background-color: var(--light-bg);
}

/* Lists */
ul, ol {
    margin-left: 1.5rem;
    margin-bottom: 1rem;
}

li {
    margin-bottom: 0.5rem;
}

/* Loading Spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* Animations */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    animation: fadeIn 0.3s ease;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 1.5rem;
    }

    h2 {
        font-size: 1.25rem;
    }

    .col-6 {
        flex: 0 0 100%;
    }

    .btn {
        width: 100%;
    }

    input,
    textarea,
    select {
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 0.95rem;
    }

    .container {
        padding: 0 0.5rem;
    }

    .btn-sm {
        padding: 0.5rem 0.75rem;
        font-size: 0.8rem;
    }
}

/* Print Styles */
@media print {
    body {
        background: white;
    }

    .btn,
    .no-print {
        display: none;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    body {
        background-color: var(--dark-bg);
        color: #f3f4f6;
    }

    input,
    textarea,
    select {
        background-color: #374151;
        color: #f3f4f6;
        border-color: #4b5563;
    }

    .card {
        background-color: #1f2937;
        border-color: #374151;
    }

    .light-bg {
        background-color: #374151;
    }
}

/* Utility Classes */
.shadow { box-shadow: var(--shadow); }
.shadow-lg { box-shadow: var(--shadow-lg); }

.rounded { border-radius: 0.5rem; }
.rounded-lg { border-radius: 0.75rem; }
.rounded-full { border-radius: 9999px; }

.border { border: 1px solid var(--border-color); }
.border-top { border-top: 1px solid var(--border-color); }
.border-bottom { border-bottom: 1px solid var(--border-color); }

.opacity-50 { opacity: 0.5; }
.opacity-75 { opacity: 0.75; }

.cursor-pointer { cursor: pointer; }
.cursor-default { cursor: default; }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.transition { transition: all 0.3s ease; }