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

:root {
    --primary-color: #4F46E5; /* Indigo 600 */
    --primary-hover: #4338CA;
    --secondary-color: #10B981; /* Emerald 500 */
    --bg-color: #0F172A; /* Slate 900 */
    --card-bg: rgba(30, 41, 59, 0.7); /* Slate 800 with opacity */
    --text-main: #F8FAFC; /* Slate 50 */
    --text-muted: #CBD5E1; /* Slate 300 */
    --danger-color: #EF4444; 
    --border-color: rgba(255, 255, 255, 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Inter', sans-serif;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: radial-gradient(circle at top right, rgba(79, 70, 229, 0.15), transparent 40%),
                      radial-gradient(circle at bottom left, rgba(16, 185, 129, 0.1), transparent 40%);
    background-attachment: fixed;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    width: 100%;
}

.glass-card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

h1, h2, h3, h4 {
    font-weight: 600;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    letter-spacing: -0.025em;
}

.title-gradient {
    background: linear-gradient(135deg, #818CF8, #34D399);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

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

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-main);
    font-size: 1rem;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.2);
    background: rgba(15, 23, 42, 0.8);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: none;
    text-decoration: none;
    gap: 0.5rem;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(79, 70, 229, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-2px);
}

.btn-danger {
    background: rgba(239, 68, 68, 0.2);
    color: #FCA5A5;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.4);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* Navbar */
.navbar {
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.25rem;
    font-weight: 700;
    color: white;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: white;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: rgba(15, 23, 42, 0.4);
}

.table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
}

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

.table th {
    background: rgba(255, 255, 255, 0.05);
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
}

.table tr:hover td {
    background: rgba(255, 255, 255, 0.05);
}

.table tr:last-child td {
    border-bottom: none;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.badge-pending {
    background: rgba(245, 158, 11, 0.2);
    color: #FCD34D;
    border: 1px solid rgba(245, 158, 11, 0.5);
}

.badge-paid {
    background: rgba(16, 185, 129, 0.2);
    color: #6EE7B7;
    border: 1px solid rgba(16, 185, 129, 0.5);
}

.badge-void {
    background: rgba(239, 68, 68, 0.2);
    color: #FCA5A5;
    border: 1px solid rgba(239, 68, 68, 0.5);
}

/* Utility */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-4 { margin-top: 2rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 2rem; }
.d-flex { display: flex; }
.justify-between { justify-content: space-between; }
.align-center { align-items: center; }
.gap-2 { gap: 1rem; }
.gap-4 { gap: 2rem; }

.alert {
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
    font-weight: 500;
}
.alert-error {
    background: rgba(239, 68, 68, 0.1);
    color: #FCA5A5;
    border: 1px solid rgba(239, 68, 68, 0.3);
}
.alert-success {
    background: rgba(16, 185, 129, 0.1);
    color: #6EE7B7;
    border: 1px solid rgba(16, 185, 129, 0.3);
}

/* Row utilities for forms */
.row {
    display: flex;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}
.col {
    flex: 1;
}
.row .form-group {
    margin-bottom: 0;
}

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

.animate-fade-in {
    animation: fadeIn 0.5s ease forwards;
}