/* =====================================================
   ORDER-VPS.CSS — Giao diện đặt mua VPS
   Design: Dark premium, gradient accents, glassmorphism
   ===================================================== */

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    /* Bảng màu chính */
    --bg: #0a0a14;
    --bg-alt: #10101e;
    --surface: #161625;
    --surface-hover: #1e1e32;
    --border: rgba(255,255,255,0.06);
    --border-hover: rgba(255,255,255,0.12);

    /* Màu accent gradient */
    --accent-1: #667eea;
    --accent-2: #764ba2;
    --accent-3: #43e97b;
    --gradient: linear-gradient(135deg, var(--accent-1) 0%, var(--accent-2) 100%);
    --gradient-green: linear-gradient(135deg, #43e97b 0%, #38f9d7 100%);

    /* Text */
    --text: #e8e8f0;
    --text-dim: #8888a8;
    --text-muted: #555570;

    /* Spacing */
    --radius: 12px;
    --radius-sm: 8px;
    --radius-lg: 16px;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'Inter', -apple-system, system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

.hidden { display: none !important; }

.container { max-width: 1100px; margin: 0 auto; padding: 0 20px; }

/* === Steps Bar (thanh tiến trình) === */
.steps-bar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(10,10,20,0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px 20px;
}

.steps-inner {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0;
}

.step {
    display: flex;
    align-items: center;
    gap: 8px;
    opacity: 0.35;
    transition: opacity 0.3s, transform 0.3s;
}

.step.active { opacity: 1; }
.step.done { opacity: 0.7; }

.step-num {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--surface);
    border: 2px solid var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    font-weight: 700;
    transition: all 0.3s;
    flex-shrink: 0;
}

.step.active .step-num {
    background: var(--gradient);
    border-color: transparent;
    color: #fff;
    box-shadow: 0 0 16px rgba(102,126,234,0.4);
}

.step.done .step-num {
    background: var(--gradient-green);
    border-color: transparent;
    color: #000;
}

.step-label { font-size: 13px; font-weight: 500; white-space: nowrap; }

.step-line {
    flex: 1;
    height: 2px;
    background: var(--border);
    margin: 0 12px;
    min-width: 20px;
    max-width: 60px;
}

/* === Section === */
.section { padding: 40px 0 60px; }

.section-header {
    text-align: center;
    margin-bottom: 32px;
    position: relative;
}

.section-header h1,
.section-header h2 {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.section-sub {
    margin-top: 8px;
    color: var(--text-dim);
    font-size: 15px;
}

.btn-back {
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-dim);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-back:hover { background: var(--surface-hover); color: var(--text); }

/* === Package Grid === */
.pkg-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

@media (max-width: 900px) { .pkg-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .pkg-grid { grid-template-columns: 1fr; } }

.pkg-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 20px;
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    overflow: hidden;
}

.pkg-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradient);
    opacity: 0;
    transition: opacity 0.25s;
}

.pkg-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0,0,0,0.3);
}

.pkg-card:hover::before { opacity: 1; }

.pkg-card.selected {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 1px var(--accent-1), 0 8px 32px rgba(102,126,234,0.15);
}
.pkg-card.selected::before { opacity: 1; }

/* Badge gói nổi bật */
.pkg-badge {
    position: absolute;
    top: 12px; right: 12px;
    background: var(--gradient-green);
    color: #000;
    font-size: 10px;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pkg-name {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 12px;
    color: var(--text);
}

.pkg-specs {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 16px;
}

.pkg-spec {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
}

.pkg-spec-label { color: var(--text-dim); }
.pkg-spec-value { color: var(--text); font-weight: 500; }

.pkg-cpu-type {
    display: inline-block;
    font-size: 10px;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
    font-weight: 600;
    letter-spacing: 0.3px;
}
.pkg-cpu-type.dedicated { background: rgba(67,233,123,0.15); color: #43e97b; }
.pkg-cpu-type.shared    { background: rgba(102,126,234,0.15); color: #667eea; }

/* Giá niêm yết bị gạch ngang (khi có sale_price) */
.pkg-price-old {
    font-size: 14px;
    color: var(--text-dim);
    text-decoration: line-through;
    opacity: 0.8;
    margin-bottom: 2px;
}

.pkg-price {
    font-size: 20px;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.pkg-price-unit {
    font-size: 13px;
    font-weight: 400;
    -webkit-text-fill-color: var(--text-dim);
}

/* Giá yearly hint — hiển thị giá/tháng khi mua 12 tháng */
.pkg-yearly-hint {
    font-size: 12px;
    color: #43e97b;
    margin-top: 6px;
    font-weight: 500;
    opacity: 0.9;
    line-height: 1.4;
}

/* Badge giảm giá — hiển thị dưới cùng card */
.pkg-sale-badge {
    display: inline-block;
    margin-top: 8px;
    background: linear-gradient(135deg, #ef4444, #f97316);
    color: #fff;
    font-size: 10px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.3px;
}

/* === Order Grid (Step 2) === */
.order-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 32px;
}

@media (max-width: 768px) { .order-grid { grid-template-columns: 1fr; } }

.order-left, .order-right {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

/* Selected Package Card */
.selected-pkg {
    background: var(--surface);
    border: 1px solid var(--accent-1);
    border-radius: var(--radius);
    padding: 20px;
}

.selected-pkg .pkg-name { font-size: 18px; margin-bottom: 8px; }
.selected-pkg .pkg-specs { margin-bottom: 0; }

/* Cycle Grid */
.cycle-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

@media (max-width: 500px) { .cycle-grid { grid-template-columns: repeat(2, 1fr); } }

.cycle-btn {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text);
}

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

.cycle-btn.selected {
    border-color: var(--accent-1);
    background: rgba(102,126,234,0.08);
}

.cycle-label { font-size: 14px; font-weight: 600; display: block; }

.cycle-discount {
    font-size: 11px;
    color: #43e97b;
    margin-top: 2px;
    display: block;
}

/* Price Summary */
.price-summary {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.price-row {
    display: flex;
    justify-content: space-between;
    padding: 6px 0;
    font-size: 14px;
}

.price-row.total {
    border-top: 1px solid var(--border);
    margin-top: 8px;
    padding-top: 12px;
    font-size: 18px;
    font-weight: 700;
}

.price-row.total .price-val {
    background: var(--gradient);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.price-label { color: var(--text-dim); }
.price-val { color: var(--text); font-weight: 500; }

/* Giá bị gạch ngang trong price summary */
.price-strikethrough {
    text-decoration: line-through;
    color: var(--text-muted) !important;
    font-weight: 400 !important;
}

/* Form */
.form-block { display: flex; flex-direction: column; gap: 6px; }

.form-label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.req { color: #ef4444; }

input[type="text"],
input[type="email"],
input[type="tel"] {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 15px;
    color: var(--text);
    font-family: inherit;
    transition: border-color 0.2s, box-shadow 0.2s;
    width: 100%;
}

input:focus {
    outline: none;
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}

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

/* Buttons */
.btn-primary {
    background: var(--gradient);
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 24px;
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: all 0.25s;
    width: 100%;
    margin-top: 8px;
    font-family: inherit;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102,126,234,0.3);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* === Payment (Step 3) === */
.payment-card {
    max-width: 760px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.payment-header {
    background: var(--gradient);
    padding: 24px;
    text-align: center;
}

.payment-header h2 { font-size: 22px; margin-bottom: 4px; }
.payment-header p { opacity: 0.85; font-size: 14px; }

.payment-body {
    display: flex;
    gap: 32px;
    padding: 32px;
    align-items: flex-start;
}

@media (max-width: 640px) {
    .payment-body { flex-direction: column; align-items: center; }
}

.qr-side { flex-shrink: 0; }

.qr-img {
    width: 220px;
    height: 220px;
    border-radius: var(--radius);
    background: #fff;
    padding: 8px;
    object-fit: contain;
}

.info-side { flex: 1; min-width: 0; }

.bank-info {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.bank-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.bank-label { font-size: 13px; color: var(--text-dim); flex-shrink: 0; }

.bank-value {
    font-size: 14px;
    font-weight: 600;
    text-align: right;
    word-break: break-all;
}

.bank-value.amount {
    font-size: 18px;
    background: var(--gradient-green);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.bank-value.copyable {
    cursor: pointer;
    padding: 4px 8px;
    background: rgba(102,126,234,0.1);
    border-radius: 4px;
    transition: background 0.2s;
}
.bank-value.copyable:hover { background: rgba(102,126,234,0.2); }

/* Trạng thái chờ thanh toán */
.payment-status {
    margin-top: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 16px;
    background: rgba(255,180,0,0.08);
    border: 1px solid rgba(255,180,0,0.2);
    border-radius: var(--radius-sm);
    color: #ffb400;
    font-weight: 500;
    font-size: 14px;
}

.pulse-dot {
    width: 10px;
    height: 10px;
    background: #ffb400;
    border-radius: 50%;
    animation: pulse 1.5s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(0.8); }
}

.payment-note {
    padding: 14px 24px;
    background: rgba(255,255,255,0.02);
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-dim);
    text-align: center;
}

/* === Result (Step 4) === */
.result-card {
    max-width: 560px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
}

/* Đang tạo VPS */
.creating-anim { text-align: center; }
.creating-anim h2 { margin: 20px 0 8px; font-size: 20px; }
.creating-anim p { color: var(--text-dim); font-size: 14px; }

.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border);
    border-top-color: var(--accent-1);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

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

/* Thành công */
.success-header { margin-bottom: 24px; }
.success-icon { font-size: 48px; margin-bottom: 8px; }
.success-header h2 { font-size: 24px; color: #43e97b; }
.success-header p { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

.vps-info-box {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: left;
    margin-bottom: 16px;
}

.vps-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
}

.vps-row + .vps-row { border-top: 1px solid var(--border); }

.vps-label { font-size: 13px; color: var(--text-dim); }

.vps-value {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
}

.vps-value.mono { font-family: 'Courier New', monospace; letter-spacing: 0.5px; }

.ssh-command {
    background: #1e1e2e;
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    text-align: left;
    margin-bottom: 20px;
}

.ssh-command label {
    font-size: 11px;
    color: var(--text-dim);
    display: block;
    margin-bottom: 6px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ssh-command code {
    color: #43e97b;
    font-size: 14px;
    word-break: break-all;
}

.btn-copy {
    background: var(--gradient);
    border: none;
    border-radius: var(--radius-sm);
    padding: 14px 32px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    transition: all 0.25s;
    font-family: inherit;
}

.btn-copy:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(102,126,234,0.3);
}

/* Số tiền không khớp (mismatch) */
.mismatch-header { margin-bottom: 16px; }
.mismatch-icon { font-size: 48px; margin-bottom: 8px; }
.mismatch-header h2 { font-size: 22px; color: #ffb400; }
.mismatch-header p { color: var(--text-dim); font-size: 14px; margin-top: 8px; line-height: 1.7; }
.mismatch-note {
    margin-top: 16px;
    padding: 16px;
    background: rgba(255,180,0,0.06);
    border: 1px solid rgba(255,180,0,0.15);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-dim);
    line-height: 1.7;
}

/* Thất bại */
.fail-header { margin-bottom: 16px; }
.fail-icon { font-size: 48px; margin-bottom: 8px; }
.fail-header h2 { font-size: 22px; color: #ef4444; }
.fail-header p { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

/* === Toast === */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%) translateY(20px);
    padding: 12px 24px;
    background: #1e1e2e;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-size: 14px;
    z-index: 1000;
    opacity: 0;
    transition: all 0.3s ease;
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* === Animations === */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.section:not(.hidden) { animation: fadeInUp 0.4s ease-out; }

/* === Subdomain Registration Section === */
.subdomain-section {
    border-top: 1px solid var(--border);
}

.subdomain-card {
    max-width: 600px;
    margin: 0 auto;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.subdomain-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

/* Input group: [subdomain].imgroup.vn */
.subdomain-input-group {
    display: flex;
    align-items: stretch;
    border-radius: var(--radius-sm);
    overflow: hidden;
    border: 1px solid var(--border);
    background: var(--bg);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.subdomain-input-group:focus-within {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(102,126,234,0.15);
}

.subdomain-input-group input {
    border: none !important;
    border-radius: 0 !important;
    background: transparent !important;
    flex: 1;
    min-width: 0;
    box-shadow: none !important;
}

.subdomain-suffix {
    display: flex;
    align-items: center;
    padding: 0 14px;
    background: rgba(102,126,234,0.08);
    color: var(--accent-1);
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    border-left: 1px solid var(--border);
    user-select: none;
}

/* Trạng thái check subdomain */
.subdomain-status {
    font-size: 12px;
    font-weight: 500;
    padding: 6px 0 0;
    transition: all 0.2s;
}

.subdomain-status.info     { color: var(--text-dim); }
.subdomain-status.checking { color: #ffb400; }
.subdomain-status.available { color: #43e97b; }
.subdomain-status.taken    { color: #ef4444; }
.subdomain-status.error    { color: #f97316; }

/* 2 cột: Họ tên + SĐT */
.subdomain-form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

@media (max-width: 500px) {
    .subdomain-form-row { grid-template-columns: 1fr; }
}

.btn-subdomain {
    margin-top: 4px;
}

/* === Responsive tweaks === */
@media (max-width: 500px) {
    .section { padding: 24px 0 40px; }
    .section-header h1,
    .section-header h2 { font-size: 22px; }
    .steps-bar { padding: 12px 10px; }
    .step-label { display: none; }
    .step-line { margin: 0 8px; }
    .payment-body { padding: 20px; }
    .result-card { padding: 28px 20px; }
    .btn-back { position: static; transform: none; margin-bottom: 16px; display: inline-block; }
    .subdomain-card { padding: 20px; }
}