/* Import font dari Google */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

/* --- CSS VARIABLES --- */
:root {
    /* --- Golden Ratio & Spacing --- */
    --phi: 1.618;
    --space-unit: 1rem;
    --space-xs: calc(var(--space-unit) / var(--phi));
    /* ~0.618rem */
    --space-sm: var(--space-unit);
    /* 1rem */
    --space-md: calc(var(--space-unit) * var(--phi));
    /* ~1.618rem */
    --space-lg: calc(var(--space-unit) * var(--phi) * var(--phi));
    /* ~2.618rem */
    --space-xl: calc(var(--space-unit) * var(--phi) * var(--phi) * var(--phi));
    /* ~4.236rem */

    /* --- Colors (Fiber Go Theme) --- */
    --primary-color: #0a192f;
    /* Deep Navy */
    --secondary-color: #ffffff;
    /* White */
    --accent-color: #f97316;
    /* Vibrant Orange */
    --accent-hover: #ea580c;
    /* Darker Orange */
    --bg-color: #020c1b;
    /* Darkest Navy Background */

    /* --- Glassmorphism --- */
    --card-bg: rgba(17, 34, 64, 0.75);
    /* Semi-transparent Navy */
    --card-border: rgba(255, 255, 255, 0.1);
    --glass-blur: blur(16px);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

    --text-main: #e2e8f0;
    --text-muted: #94a3b8;
    --border-color: #233554;
    --input-bg: rgba(29, 59, 102, 0.5);
    /* Semi-transparent input */

    --radius-md: 12px;
    --radius-lg: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="light"] {
    /* Fallback/Alternative Light Mode */
    --bg-color: #f0f2f5;
    --card-bg: rgba(255, 255, 255, 0.8);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --card-border: rgba(255, 255, 255, 0.5);
    --input-bg: rgba(255, 255, 255, 0.9);
}

/* --- RESET & BASE --- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: var(--transition);
    background-image:
        radial-gradient(at 0% 0%, rgba(249, 115, 22, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(59, 130, 246, 0.15) 0px, transparent 50%);
    background-attachment: fixed;
}

/* --- NAVBAR --- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background-color: rgba(10, 25, 47, 0.85);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.nav-brand i {
    color: var(--accent-color);
}

.theme-toggle {
    background: transparent;
    width: 40px;
    height: 40px;
    padding: 0;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--input-bg);
    transform: rotate(15deg);
    border-color: var(--accent-color);
}

/* --- LAYOUT --- */
.main-wrapper {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: var(--space-md) var(--space-sm);
}

.container {
    max-width: 520px;
    width: 100%;
}

/* --- CARDS (Glassmorphism) --- */
.card {
    background: var(--card-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: var(--space-lg);
    margin-bottom: var(--space-md);
    transition: var(--transition);
    animation: fadeIn 0.6s cubic-bezier(0.22, 1, 0.36, 1);
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.card-header {
    text-align: center;
    margin-bottom: var(--space-md);
}

.card h2 {
    font-size: calc(1rem * var(--phi) * 1.2);
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: var(--space-xs);
}

.card h3 {
    font-size: calc(1rem * var(--phi));
    font-weight: 600;
    color: var(--text-main);
}

.card p {
    color: var(--text-muted);
    font-size: 1rem;
    line-height: var(--phi);
}

.divider {
    height: 4px;
    width: 50px;
    background-color: var(--accent-color);
    margin: var(--space-md) auto 0;
    border-radius: 2px;
}

/* --- FORMS --- */
.form-group {
    margin-bottom: var(--space-md);
}

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

.input-wrapper {
    position: relative;
}

.input-wrapper i {
    position: absolute;
    left: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    z-index: 1;
}

.form-group input,
.form-select {
    width: 100%;
    padding: var(--space-sm) var(--space-sm) var(--space-sm) calc(var(--space-sm) * 2.5);
    font-size: 1rem;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    transition: var(--transition);
}

.form-group input:focus,
.form-select:focus {
    outline: none;
    border-color: var(--accent-color);
    background-color: rgba(29, 59, 102, 0.8);
    box-shadow: 0 0 0 4px rgba(249, 115, 22, 0.15);
}

/* --- BUTTONS --- */
.btn-primary,
.btn-secondary {
    width: 100%;
    padding: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
    font-family: 'Outfit', sans-serif;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
    color: #ffffff;
    box-shadow: 0 4px 15px rgba(249, 115, 22, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(249, 115, 22, 0.5);
}

.btn-secondary {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    margin-top: var(--space-sm);
}

.btn-secondary:hover {
    background-color: var(--input-bg);
    border-color: var(--text-muted);
}

/* --- DETAIL TAGIHAN --- */
.tagihan-list {
    list-style: none;
    margin-bottom: var(--space-md);
    background-color: var(--input-bg);
    border-radius: var(--radius-md);
    padding: var(--space-md);
    border: 1px solid var(--border-color);
}

.tagihan-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}

.tagihan-list li:last-child {
    border-bottom: none;
}

.tagihan-list .label {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.total-row .harga {
    font-size: 1.25rem;
    color: var(--accent-color);
    font-weight: 700;
}

/* --- STATUS BADGE --- */
.status-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    background-color: rgba(249, 115, 22, 0.15);
    color: var(--accent-color);
    border: 1px solid rgba(249, 115, 22, 0.3);
}

.status-badge.paid {
    background-color: rgba(34, 197, 94, 0.15);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

/* --- PAYMENT METHODS --- */
.payment-instruction {
    text-align: center;
    margin-bottom: var(--space-sm);
    font-weight: 500;
}

.payment-methods {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
}

.btn-payment {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    background-color: var(--input-bg);
    cursor: pointer;
    transition: var(--transition);
    height: 110px;
}

.btn-payment:hover {
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    background-color: rgba(29, 59, 102, 0.8);
}

.btn-payment img {
    width: 60px;
    height: auto;
    margin-bottom: 0.5rem;
    object-fit: contain;
}

.btn-payment span {
    font-size: 0.85rem;
    color: var(--text-main);
    text-align: center;
}

/* --- PAYMENT GROUPS --- */
.payment-group {
    margin-bottom: var(--space-sm);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    background-color: var(--input-bg);
}

.payment-group-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) 1.25rem;
    cursor: pointer;
    background-color: rgba(10, 25, 47, 0.5);
    transition: var(--transition);
    user-select: none;
}

.payment-group-header:hover {
    background-color: rgba(10, 25, 47, 0.8);
}

.payment-group-header .group-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 600;
    color: var(--text-main);
}

.payment-group-header .group-info i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.payment-group-header .group-arrow {
    font-size: 0.875rem;
    color: var(--text-muted);
    transition: transform 0.3s ease;
}

.payment-group-header.active .group-arrow {
    transform: rotate(180deg);
}

.payment-group-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 var(--space-sm);
}

.payment-group-content.active {
    max-height: 1000px;
    padding: var(--space-sm);
}

.payment-group-content .btn-payment {
    margin-bottom: 0.75rem;
    width: 100%;
    flex-direction: row;
    justify-content: flex-start;
    gap: 1rem;
    height: auto;
    padding: 0.875rem 1rem;
}

.payment-group-content .btn-payment:last-child {
    margin-bottom: 0;
}

.payment-group-content .btn-payment img {
    width: 50px;
    margin-bottom: 0;
}

.payment-group-content .btn-payment span {
    text-align: left;
    font-size: 0.9375rem;
}

.active-payment {
    border-color: var(--accent-color) !important;
    background-color: rgba(249, 115, 22, 0.1) !important;
    box-shadow: 0 0 0 2px rgba(249, 115, 22, 0.2);
}

/* --- MESSAGES --- */
#message-area {
    margin-top: var(--space-sm);
    padding: var(--space-sm);
    border-radius: var(--radius-md);
    text-align: center;
    font-weight: 500;
    font-size: 0.95rem;
}

.message-loading {
    background-color: rgba(59, 130, 246, 0.1);
    color: #3b82f6;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.message-error {
    background-color: rgba(220, 53, 69, 0.1);
    color: #ef4444;
    border: 1px solid rgba(220, 53, 69, 0.2);
}

.message-success {
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.2);
}

/* --- UTILITIES --- */
.hidden {
    display: none !important;
}

/* --- FLOATING CONTACT --- */
.floating-contact {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    z-index: 1000;
}

.contact-btn {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: linear-gradient(135deg, #25D366 0%, #128C7E 100%);
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: pulse 2s infinite;
}

.contact-btn:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
    animation: none;
}

.contact-btn i {
    font-size: 1.5rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
}

.contact-name {
    font-size: 0.85rem;
    opacity: 0.95;
}

.contact-number {
    font-size: 0.75rem;
    opacity: 0.8;
}

@keyframes pulse {

    0%,
    100% {
        box-shadow: 0 4px 15px rgba(37, 211, 102, 0.4);
    }

    50% {
        box-shadow: 0 4px 25px rgba(37, 211, 102, 0.7);
    }
}

/* Responsive */
@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .card {
        padding: 1.5rem;
    }

    .payment-methods {
        grid-template-columns: repeat(2, 1fr);
    }

    .payment-methods .btn-payment:last-child {
        grid-column: span 2;
    }

    .floating-contact {
        bottom: 1rem;
        right: 1rem;
    }

    .contact-btn {
        padding: 0.875rem 1.25rem;
    }
}