/* assets/css/style.css */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #3b82f6;
    --light: #f1f5f9;
    --dark: #1e293b;
    --white: #ffffff;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: #f0f4f8;
    color: var(--dark);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

/* Mobile Container */
.mobile-container {
    max-width: 480px;
    margin: 0 auto;
    background: var(--white);
    min-height: 100vh;
    position: relative;
    box-shadow: 0 0 20px rgba(0,0,0,0.1);
}

/* Header */
.header {
    background: var(--gradient-1);
    color: var(--white);
    padding: 20px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

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

.header h1 {
    font-size: 1.25rem;
    font-weight: 600;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
}

.avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
}

/* Navigation Bottom */
.bottom-nav {
    position: fixed;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100%;
    max-width: 480px;
    background: var(--white);
    display: flex;
    justify-content: space-around;
    padding: 10px 0;
    box-shadow: 0 -4px 6px -1px rgba(0, 0, 0, 0.1);
    z-index: 100;
    border-top: 1px solid #e2e8f0;
}

.nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: var(--secondary);
    font-size: 0.75rem;
    transition: all 0.3s;
    padding: 5px 15px;
}

.nav-item i {
    font-size: 1.5rem;
    margin-bottom: 3px;
}

.nav-item.active, .nav-item:hover {
    color: var(--primary);
}

/* Content Area */
.content {
    padding: 20px;
    padding-bottom: 80px;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: 16px;
    padding: 20px;
    margin-bottom: 16px;
    box-shadow: var(--shadow);
    border: 1px solid #e2e8f0;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
    margin-bottom: 20px;
}

.stat-card {
    background: var(--white);
    border-radius: 16px;
    padding: 16px;
    text-align: center;
    box-shadow: var(--shadow);
    border: 1px solid #e2e8f0;
    transition: transform 0.2s;
}

.stat-card:active {
    transform: scale(0.98);
}

.stat-card.primary { background: var(--gradient-1); color: white; }
.stat-card.success { background: var(--gradient-3); color: white; }
.stat-card.warning { background: linear-gradient(135deg, #f6d365 0%, #fda085 100%); color: white; }
.stat-card.danger { background: var(--gradient-2); color: white; }

.stat-icon {
    font-size: 2rem;
    margin-bottom: 8px;
    opacity: 0.9;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 0.75rem;
    opacity: 0.9;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 12px;
    border: none;
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    text-decoration: none;
    width: 100%;
    margin-bottom: 10px;
}

.btn-primary {
    background: var(--gradient-1);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
    color: white;
}

.btn-danger {
    background: var(--gradient-2);
    color: white;
}

.btn-secondary {
    background: var(--light);
    color: var(--dark);
}

.btn:active {
    transform: scale(0.98);
    opacity: 0.9;
}

/* Form Elements */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--secondary);
}

.form-control {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    transition: all 0.3s;
    background: var(--white);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='currentColor' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 20px;
    padding-right: 40px;
}

/* List Items */
.list-item {
    background: var(--white);
    border-radius: 12px;
    padding: 16px;
    margin-bottom: 12px;
    box-shadow: var(--shadow);
    border: 1px solid #e2e8f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s;
}

.list-item:active {
    transform: scale(0.99);
    background: #f8fafc;
}

.list-content h4 {
    font-size: 1rem;
    margin-bottom: 4px;
    color: var(--dark);
}

.list-content p {
    font-size: 0.875rem;
    color: var(--secondary);
}

.list-badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-success { background: #d1fae5; color: #065f46; }
.badge-warning { background: #fef3c7; color: #92400e; }
.badge-danger { background: #fee2e2; color: #991b1b; }
.badge-info { background: #dbeafe; color: #1e40af; }

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 20px;
    background: var(--gradient-1);
}

.login-box {
    background: var(--white);
    border-radius: 24px;
    padding: 40px 24px;
    box-shadow: var(--shadow-lg);
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo i {
    font-size: 4rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.login-logo h2 {
    color: var(--dark);
    font-size: 1.5rem;
}

/* Search Bar */
.search-container {
    position: relative;
    margin-bottom: 20px;
}

.search-input {
    width: 100%;
    padding: 14px 16px 14px 48px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 1rem;
    background: var(--white);
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary);
}

/* Tagihan Detail */
.tagihan-detail {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 16px;
    padding: 24px;
    margin-bottom: 20px;
    text-align: center;
}

.tagihan-total {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 10px 0;
}

.tagihan-label {
    opacity: 0.9;
    font-size: 0.875rem;
}

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

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

/* Loading */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Alert */
.alert {
    padding: 16px;
    border-radius: 12px;
    margin-bottom: 16px;
    font-size: 0.875rem;
}

.alert-success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #a7f3d0;
}

.alert-danger {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px 20px;
    color: var(--secondary);
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 16px;
    opacity: 0.5;
}

/* Print Styles */
@media print {
    .bottom-nav, .header, .btn {
        display: none !important;
    }
    .content {
        padding: 0;
    }
}

/* Responsive */
@media (min-width: 481px) {
    body {
        background: #e2e8f0;
    }
}