// Pay-Me — Design System
// Font: Inter | Style: Glassmorphism on deep gradient
// Palette: Indigo (#4f46e5) / Violet (#7c3aed) / Slate text

// ─── Variables ────────────────────────────────────────────
@primary: #4f46e5;
@primary-light: #6366f1;
@primary-dark: #4338ca;
@accent: #7c3aed;
@paypal-blue: #0070ba;
@paypal-hover: #005ea6;

@bg-start: #312e81;
@bg-end: #581c87;

@card-bg: rgba(255, 255, 255, 0.92);
@card-border: rgba(255, 255, 255, 0.25);
@card-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
@card-radius: 20px;

@text-primary: #1e293b;
@text-secondary: #64748b;
@text-muted: #94a3b8;

@transition-fast: 150ms ease;
@transition-base: 250ms ease;

// ─── Base ─────────────────────────────────────────────────
* {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

body {
    background: linear-gradient(135deg, @bg-start 0%, @bg-end 100%);
    min-height: 100vh;
    min-height: 100dvh;
}

.container {
    padding: 1.5rem;
    max-width: 1200px;
}

// ─── Entrance animation ──────────────────────────────────
.animate-in {
    animation: fadeSlideUp 500ms ease both;
}

.delay-1 { animation-delay: 100ms; }
.delay-2 { animation-delay: 200ms; }

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(16px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    .animate-in { animation: none; }
}

// ─── Typography ───────────────────────────────────────────
h1 {
    color: @text-primary;
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

h4 {
    color: @text-primary;
    font-weight: 600;
    font-size: 1.1rem;
    margin: 0;
}

.subtitle {
    color: @text-secondary;
    font-size: 1rem;
    line-height: 1.6;
    margin: 0;
}

// ─── Brand icon ───────────────────────────────────────────
.brand-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    background: linear-gradient(135deg, @primary, @accent);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;

    i {
        color: white;
        font-size: 1.5rem;
    }
}

// ─── Cards ────────────────────────────────────────────────
.content-card,
.payment-section {
    background: @card-bg;
    border-radius: @card-radius;
    padding: 2rem;
    box-shadow: @card-shadow;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid @card-border;
}

.content-card {
    text-align: center;
}

// ─── Form controls ────────────────────────────────────────
.form-label {
    font-weight: 600;
    font-size: 0.875rem;
    color: @text-secondary;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.5rem;
}

.form-control {
    border-radius: 12px;
    border: 2px solid #e2e8f0;
    padding: 0.75rem 1rem;
    font-size: 1.125rem;
    font-weight: 500;
    color: @text-primary;
    transition: border-color @transition-fast, box-shadow @transition-fast;

    &:focus {
        border-color: @primary;
        box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.12);
        outline: none;
    }

    &::placeholder {
        color: @text-muted;
        font-weight: 400;
    }
}

.form-control-lg {
    padding: 0.875rem 1rem;
    font-size: 1.25rem;
}

.input-group-text {
    background: @primary;
    color: white;
    border: 2px solid @primary;
    border-radius: 12px 0 0 12px;
    font-weight: 600;
    padding: 0.75rem 1rem;
}

.input-group .form-control {
    border-radius: 0 12px 12px 0;
}

// ─── Buttons ──────────────────────────────────────────────
.btn {
    border-radius: 12px;
    padding: 0.75rem 1.5rem;
    font-weight: 600;
    font-size: 1rem;
    transition: all @transition-base;
    border: none;
    cursor: pointer;

    &:focus-visible {
        outline: 3px solid @primary-light;
        outline-offset: 2px;
    }
}

.btn-lg {
    padding: 0.875rem 1.5rem;
    font-size: 1.1rem;
}

.btn-primary {
    background: linear-gradient(135deg, @primary, @accent);
    color: white;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);

    &:hover {
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(79, 70, 229, 0.4);
        background: linear-gradient(135deg, @primary-dark, darken(@accent, 5%));
        color: white;
    }

    &:active {
        transform: translateY(0);
        box-shadow: 0 2px 8px rgba(79, 70, 229, 0.3);
    }
}

.btn-paypal {
    background: @paypal-blue;
    color: white;
    box-shadow: 0 4px 12px rgba(0, 112, 186, 0.25);

    &:hover {
        background: @paypal-hover;
        transform: translateY(-1px);
        box-shadow: 0 6px 20px rgba(0, 112, 186, 0.35);
        color: white;
    }

    &:active {
        transform: translateY(0);
    }
}

// ─── Payment page ─────────────────────────────────────────
.payment-label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: @text-muted;
    margin-bottom: 0.25rem;
}

.amount-display {
    font-size: 2.75rem;
    font-weight: 700;
    color: @primary;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.payee-name {
    font-size: 1.1rem;
    color: @text-secondary;
    font-weight: 500;
    margin-bottom: 0;
}

// ─── Section headers ──────────────────────────────────────
.section-header {
    display: flex;
    align-items: center;
    gap: 0.875rem;
    margin-bottom: 1.25rem;
}

.section-icon {
    width: 44px;
    height: 44px;
    min-width: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;

    i { font-size: 1.1rem; }
}

.paypal-icon {
    background: fade(@paypal-blue, 10%);
    i { color: @paypal-blue; }
}

.bank-icon {
    background: fade(@primary, 10%);
    i { color: @primary; }
}

.section-subtitle {
    color: @text-muted;
    font-size: 0.875rem;
    margin: 0;
}

// ─── Bank details ─────────────────────────────────────────
.bank-details {
    background: #f8fafc;
    border-radius: 12px;
    padding: 0.25rem 0;
    margin-bottom: 1.25rem;
    border: 1px solid #e2e8f0;
}

.bank-detail-row {
    display: flex;
    align-items: center;
    padding: 0.625rem 1rem;
    gap: 0.75rem;

    & + & {
        border-top: 1px solid #e2e8f0;
    }
}

.bank-detail-label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: @text-muted;
    min-width: 64px;
}

.bank-detail-value {
    flex: 1;
    font-weight: 500;
    color: @text-primary;
    font-size: 0.95rem;
}

.monospace {
    font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
    letter-spacing: 0.03em;
}

.btn-copy {
    background: none;
    border: none;
    cursor: pointer;
    color: @text-muted;
    padding: 6px 8px;
    border-radius: 8px;
    transition: all @transition-fast;
    min-width: 36px;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;

    &:hover {
        background: #e2e8f0;
        color: @primary;
    }

    &.copied {
        color: #16a34a;
    }

    &:focus-visible {
        outline: 2px solid @primary-light;
        outline-offset: 1px;
    }
}

// ─── QR code ──────────────────────────────────────────────
.qr-code-container {
    text-align: center;
    padding: 1.5rem;
    background: white;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
}

.qr-label {
    font-weight: 600;
    font-size: 0.95rem;
    color: @text-primary;
    margin-bottom: 1rem;
}

.qr-code-img {
    display: block;
    margin: 0 auto 0.75rem;
    max-width: 200px;
}

.qr-hint {
    font-size: 0.8rem;
    color: @text-muted;
    margin: 0;
}

// ─── Back link ────────────────────────────────────────────
.btn-back {
    display: inline-flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 1rem;
    border-radius: 10px;
    transition: all @transition-fast;

    &:hover {
        color: white;
        background: rgba(255, 255, 255, 0.1);
    }

    &:focus-visible {
        outline: 2px solid rgba(255, 255, 255, 0.5);
        outline-offset: 2px;
    }
}

// ─── Footer ───────────────────────────────────────────────
footer {
    background: rgba(0, 0, 0, 0.15) !important;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-text {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.85rem;

    .fa-heart {
        color: #f43f5e;
    }

    a {
        color: rgba(255, 255, 255, 0.7);
        text-decoration: none;
        transition: color @transition-fast;

        &:hover {
            color: white;
        }
    }
}

// ─── Responsive: tablet ───────────────────────────────────
@media (max-width: 768px) {
    .container {
        padding: 0.75rem;
    }

    .content-card,
    .payment-section {
        padding: 1.5rem;
        border-radius: 16px;
    }

    h1 {
        font-size: 1.75rem;
    }

    .amount-display {
        font-size: 2.25rem;
    }

    .btn-lg {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
    }

    .bank-detail-value {
        font-size: 0.875rem;
    }
}

// ─── Responsive: small phone ──────────────────────────────
@media (max-width: 480px) {
    .container {
        padding: 0.5rem;
    }

    .content-card,
    .payment-section {
        padding: 1.25rem;
        border-radius: 14px;
    }

    h1 {
        font-size: 1.5rem;
    }

    .amount-display {
        font-size: 2rem;
    }

    .brand-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;

        i { font-size: 1.25rem; }
    }

    .bank-detail-row {
        flex-wrap: wrap;
        padding: 0.5rem 0.75rem;
    }

    .bank-detail-label {
        min-width: 100%;
        margin-bottom: 0.125rem;
    }

    .bank-detail-value {
        font-size: 0.85rem;
    }
}