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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --bg-color: #f3f4f6;
    --card-bg: #ffffff;
    --text-main: #1f2937;
    --text-muted: #6b7280;
    --border-color: #e5e7eb;
    --danger-color: #ef4444;
    --success-color: #10b981;
    --info-color: #3b82f6;
    --border-radius: 12px;
    --transition-speed: 0.3s;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.6;
}

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

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

.container {
    width: 100%;
    max-width: 900px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Navbar */
.navbar {
    background-color: var(--card-bg);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

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

.navbar h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--info-color));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Cards */
.card {
    background: var(--card-bg);
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.05), 0 4px 6px -2px rgba(0, 0, 0, 0.025);
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.form-card {
    max-width: 450px;
    margin: 60px auto;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
}

.card h2 {
    margin-bottom: 20px;
    font-size: 1.5rem;
    font-weight: 600;
}

/* Forms */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 0.95rem;
    color: var(--text-main);
}

input[type="text"],
input[type="password"],
input[type="file"] {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: 'Inter', sans-serif;
    transition: border-color var(--transition-speed), box-shadow var(--transition-speed);
    outline: none;
    background-color: #fff;
}

input[type="text"]:focus,
input[type="password"]:focus,
input[type="file"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

/* Form File Input Specific Fixes */
input[type="file"]::file-selector-button {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 12px;
    cursor: pointer;
    font-weight: 500;
    transition: background-color var(--transition-speed);
    margin-right: 15px;
    font-family: 'Inter', sans-serif;
}

input[type="file"]::file-selector-button:hover {
    background-color: #e5e7eb;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-speed);
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 6px -1px rgba(99, 102, 241, 0.3);
}

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

.btn-sm {
    padding: 6px 12px;
    font-size: 0.875rem;
    border-radius: 6px;
}

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

.btn-info:hover {
    background-color: #2563eb;
    box-shadow: 0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.btn-logout {
    margin-left: 15px;
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 16px;
    font-size: 0.9rem;
}

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

/* Alerts */
.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 0.95rem;
}

.alert-danger {
    background-color: #fef2f2;
    color: var(--danger-color);
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #ecfdf5;
    color: var(--success-color);
    border: 1px solid #a7f3d0;
}

/* Tables */
.table-responsive {
    overflow-x: auto;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
}

.table th,
.table td {
    padding: 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.table th {
    font-weight: 600;
    color: var(--text-muted);
    background-color: #f9fafb;
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
}

.table tbody tr {
    transition: background-color var(--transition-speed);
}

.table tbody tr:hover {
    background-color: #f9fafb;
}

/* Utils */
.mt-3 { margin-top: 15px; }
.mt-4 { margin-top: 30px; }
.mb-4 { margin-bottom: 30px; }
.text-center { text-align: center; }

@media (max-width: 600px) {
    .nav-content {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
    .btn-logout {
        margin-left: 0;
        margin-top: 10px;
        display: inline-block;
    }
    .card {
        padding: 20px;
    }
}