/* ==========================================================================
   DESIGN SYSTEM & VARIABLES
   ========================================================================== */
:root {
    /* Primary brand colors based on BÜLIO palette */
    --color-primary: #d44d32;       /* Warm orange-red from product */
    --color-primary-hover: #b8371f; /* Deeper red-orange */
    --color-primary-light: #fbece7; /* Light warm-orange background */
    --color-secondary: #f3a88c;     /* Soft peach */
    --color-dark: #3a221d;          /* Coffee brown / dark accent */
    --color-light: #fefcfb;         /* Off-white */
    --color-gray-light: #f0ebe8;    /* Soft gray-beige */
    --color-gray: #8c7e7b;          /* Muted brown-gray */
    --color-success: #2d8a4e;       /* Calm green */
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(58, 34, 29, 0.05);
    --shadow-md: 0 8px 24px rgba(58, 34, 29, 0.08);
    --shadow-lg: 0 16px 40px rgba(58, 34, 29, 0.15);
    
    /* Borders & Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    
    /* Layout */
    --content-max-width: 750px; /* Constraints portrait posters for visual excellence */
}

/* ==========================================================================
   RESET & BASE STYLES
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: 'Outfit', 'Noto Sans TC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: #f7f3f0;
    color: var(--color-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

/* ==========================================================================
   HEADER NAVIGATION
   ========================================================================== */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(254, 252, 251, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(212, 77, 50, 0.1);
    transition: var(--transition);
}

.main-header.scrolled {
    box-shadow: var(--shadow-sm);
    background: rgba(254, 252, 251, 0.95);
}

.header-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.brand-text {
    font-family: 'Outfit', sans-serif;
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: 0.5px;
    color: var(--color-primary);
}

.product-tag {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-dark);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-item {
    font-size: 0.85rem;
    font-weight: 500;
    padding: 6px 10px;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.nav-item:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

.cta-nav {
    background: var(--color-primary);
    color: var(--color-light) !important;
    font-weight: 700;
    padding: 8px 14px;
    box-shadow: 0 4px 10px rgba(212, 77, 50, 0.2);
}

.cta-nav:hover {
    background: var(--color-primary-hover) !important;
    transform: translateY(-1px);
}

.mobile-menu-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.2rem;
    color: var(--color-dark);
    cursor: pointer;
    padding: 5px;
}

/* Mobile Nav Overlay */
.mobile-nav-overlay {
    position: fixed;
    top: 55px;
    left: 0;
    width: 100%;
    height: 0;
    background: rgba(254, 252, 251, 0.98);
    z-index: 99;
    overflow: hidden;
    transition: height 0.3s ease;
    display: flex;
    justify-content: center;
    align-items: center;
    border-bottom: 1px solid rgba(212, 77, 50, 0.1);
}

.mobile-nav-overlay.open {
    height: calc(220px);
}

.mobile-nav-links {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 18px;
    width: 100%;
}

.mobile-nav-item {
    font-size: 1rem;
    font-weight: 500;
    color: var(--color-dark);
    padding: 5px 20px;
}

.mobile-cta-nav {
    background: var(--color-primary);
    color: var(--color-light);
    font-weight: 700;
    padding: 10px 30px;
    border-radius: 30px;
}

/* ==========================================================================
   POSTER SECTIONS (MOBILE-FIRST VERTICAL SCROLL)
   ========================================================================== */
main {
    padding-top: 55px; /* Offset for header */
}

.poster-section {
    max-width: var(--content-max-width);
    margin: 0 auto;
    background-color: var(--color-light);
    overflow: hidden;
    position: relative;
    box-shadow: var(--shadow-sm);
}

.poster-img {
    width: 100%;
    height: auto;
    object-fit: cover;
}

/* ==========================================================================
   INTERACTIVE CHECKOUT SECTION
   ========================================================================== */
.checkout-section {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 50px 20px 80px;
    background: linear-gradient(180deg, #fffcfb 0%, #fef7f4 100%);
    box-shadow: var(--shadow-sm);
}

.checkout-container {
    width: 100%;
}

.section-title-wrap {
    text-align: center;
    margin-bottom: 40px;
}

.sub-title {
    font-family: 'Outfit', sans-serif;
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 3px;
    display: block;
    margin-bottom: 8px;
}

.section-title {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.section-desc {
    font-size: 0.9rem;
    color: var(--color-gray);
}

/* Plan Cards Grid */
.plan-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
    margin-bottom: 40px;
}

.plan-card {
    background: var(--color-light);
    border: 2px solid var(--color-gray-light);
    border-radius: var(--radius-md);
    padding: 24px;
    position: relative;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.plan-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-secondary);
    box-shadow: var(--shadow-md);
}

.plan-card.active {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
    box-shadow: 0 10px 25px rgba(212, 77, 50, 0.12);
}

.plan-badge {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--color-gray);
    color: var(--color-light);
    font-size: 0.7rem;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    letter-spacing: 0.5px;
}

.plan-card.active .plan-badge {
    background: var(--color-primary);
}

/* Featured Plan Style */
.plan-card.featured {
    border-color: var(--color-secondary);
}

.plan-card.featured .plan-badge {
    background: var(--color-primary);
    animation: pulse 2s infinite;
}

.plan-name {
    font-size: 1.3rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 4px;
}

.plan-qty {
    font-size: 0.85rem;
    color: var(--color-gray);
    margin-bottom: 16px;
    font-weight: 500;
}

.plan-price-block {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 20px;
}

.original-price {
    font-size: 0.8rem;
    text-decoration: line-through;
    color: var(--color-gray);
}

.price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primary);
}

.price .num {
    font-size: 2rem;
}

.plan-features {
    list-style: none;
    margin-bottom: 24px;
    flex-grow: 1;
}

.plan-features li {
    font-size: 0.85rem;
    color: var(--color-dark);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.plan-features li i {
    color: var(--color-primary);
    font-size: 0.9rem;
}

.select-plan-btn {
    width: 100%;
    background: var(--color-gray-light);
    color: var(--color-dark);
    border: none;
    border-radius: var(--radius-sm);
    padding: 10px 0;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
}

.plan-card.active .select-plan-btn {
    background: var(--color-primary);
    color: var(--color-light);
    box-shadow: 0 4px 12px rgba(212, 77, 50, 0.2);
}

/* Form Wrapper & Grid */
.form-wrapper {
    background: var(--color-light);
    border-radius: var(--radius-lg);
    padding: 24px;
    border: 1px solid rgba(212, 77, 50, 0.08);
    box-shadow: var(--shadow-md);
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.form-sec-title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 20px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary-light);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-sec-title i {
    color: var(--color-primary);
}

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

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.required {
    color: var(--color-primary);
    margin-left: 2px;
}

.input-with-icon {
    position: relative;
}

.input-with-icon i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-gray);
    font-size: 0.95rem;
}

.form-group input[type="text"],
.form-group input[type="tel"],
.form-group input[type="email"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 14px 12px 40px;
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    background: #faf7f5;
    font-family: inherit;
    font-size: 0.9rem;
    color: var(--color-dark);
    transition: var(--transition);
}

.form-group textarea {
    padding-left: 14px;
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--color-primary);
    background: var(--color-light);
    box-shadow: 0 0 0 3px rgba(212, 77, 50, 0.1);
}

/* Error Messages */
.error-msg {
    display: none;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-top: 4px;
}

.form-group.invalid input,
.form-group.invalid textarea,
.form-group.invalid select {
    border-color: var(--color-primary);
    background-color: #fff6f4;
}

.form-group.invalid .error-msg {
    display: block;
}

/* Shipping / Payment Radio Cards */
.shipping-options,
.payment-options {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.payment-options {
    grid-template-columns: repeat(3, 1fr);
}

.radio-card {
    background: #faf7f5;
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    padding: 12px 8px;
    cursor: pointer;
    text-align: center;
    position: relative;
    transition: var(--transition);
}

.radio-card input[type="radio"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.radio-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.radio-content i {
    font-size: 1.1rem;
    color: var(--color-gray);
    transition: var(--transition);
}

.radio-content span {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--color-gray);
    transition: var(--transition);
}

.radio-card:hover {
    border-color: var(--color-secondary);
}

.radio-card.active {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

.radio-card.active .radio-content i {
    color: var(--color-primary);
}

.radio-card.active .radio-content span {
    color: var(--color-primary);
}

/* Dynamic field visibility */
.hidden {
    display: none !important;
}

/* Store Row layout */
.store-row {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 10px;
}

.store-row select {
    padding-left: 14px;
}

/* Credit Card Fields Box */
.credit-card-fields {
    background: #faf7f5;
    border: 1px solid var(--color-gray-light);
    border-radius: var(--radius-sm);
    padding: 16px;
}

.card-inputs-grid {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.card-inputs-grid input {
    padding-left: 14px !important;
}

.card-expiry-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

/* Order Summary Box */
.order-summary-box {
    background: var(--color-primary-light);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
    border: 1px dashed var(--color-secondary);
}

.summary-title {
    font-size: 0.95rem;
    font-weight: 800;
    margin-bottom: 12px;
    color: var(--color-dark);
}

.summary-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 0.85rem;
}

.summary-label {
    color: var(--color-gray);
    font-weight: 500;
}

.summary-val {
    font-weight: 700;
    color: var(--color-dark);
    text-align: right;
}

.summary-divider {
    border: none;
    border-top: 1px solid rgba(212, 77, 50, 0.15);
    margin: 12px 0;
}

.total-row {
    align-items: center;
    margin-bottom: 0;
}

.total-row .summary-label {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--color-dark);
}

.total-price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--color-primary);
}

/* Submit Button & Badges */
.submit-order-btn {
    width: 100%;
    background: var(--color-primary);
    color: var(--color-light);
    border: none;
    border-radius: var(--radius-sm);
    padding: 16px;
    font-size: 1.05rem;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 6px 20px rgba(212, 77, 50, 0.25);
    transition: var(--transition);
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
}

.submit-order-btn:hover {
    background: var(--color-primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(212, 77, 50, 0.35);
}

.submit-order-btn:active {
    transform: translateY(0);
}

.security-badges {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 16px;
}

.security-badges span {
    font-size: 0.75rem;
    color: var(--color-gray);
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 4px;
}

.security-badges span i {
    color: var(--color-success);
}

/* ==========================================================================
   INFO TEXT SECTION (FOR SEO & LAYOUT COMPLEMENT)
   ========================================================================== */
.info-section {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 40px 20px;
    background: var(--color-light);
    border-top: 1px solid var(--color-gray-light);
    box-shadow: var(--shadow-sm);
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

.info-card {
    text-align: center;
    padding: 10px;
}

.info-icon-wrap {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--color-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
}

.info-icon-wrap i {
    color: var(--color-primary);
    font-size: 1.3rem;
}

.info-card h3 {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-dark);
    margin-bottom: 8px;
}

.info-card p {
    font-size: 0.85rem;
    color: var(--color-gray);
    line-height: 1.5;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.main-footer {
    max-width: var(--content-max-width);
    margin: 0 auto;
    padding: 30px 20px 100px; /* Large bottom padding for mobile sticky bar */
    background: var(--color-dark);
    color: #e5dbd9;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.footer-container {
    width: 100%;
}

.copyright {
    font-size: 0.75rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: 0.5px;
}

.disclaimer {
    font-size: 0.65rem;
    color: #9c8986;
    line-height: 1.4;
}

/* ==========================================================================
   STICKY BOTTOM CTA BAR (MOBILE)
   ========================================================================== */
.sticky-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: rgba(254, 252, 251, 0.9);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid rgba(212, 77, 50, 0.15);
    box-shadow: 0 -4px 15px rgba(58, 34, 29, 0.08);
    z-index: 90;
    padding: 12px 20px;
    transform: translateY(100%);
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.sticky-cta-bar.visible {
    transform: translateY(0);
}

.sticky-cta-container {
    max-width: var(--content-max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sticky-info {
    display: flex;
    flex-direction: column;
}

.sticky-plan-label {
    font-size: 0.75rem;
    color: var(--color-gray);
    font-weight: 600;
}

.sticky-price {
    font-family: 'Outfit', sans-serif;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--color-primary);
}

.sticky-btn {
    background: var(--color-primary);
    color: var(--color-light);
    border-radius: 30px;
    padding: 10px 20px;
    font-size: 0.9rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 6px;
    box-shadow: 0 4px 12px rgba(212, 77, 50, 0.2);
    transition: var(--transition);
}

.sticky-btn:hover {
    background: var(--color-primary-hover);
    transform: scale(1.03);
}

/* ==========================================================================
   SUCCESS MODAL POPUP
   ========================================================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(58, 34, 29, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background: var(--color-light);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    padding: 30px 24px;
    text-align: center;
    box-shadow: var(--shadow-lg);
    transform: translateY(30px) scale(0.95);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.15);
    max-height: 90vh;
    overflow-y: auto;
}

.modal-overlay.open .modal-card {
    transform: translateY(0) scale(1);
}

.success-icon-wrap {
    width: 60px;
    height: 60px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 2.2rem;
}

.modal-title {
    font-size: 1.4rem;
    font-weight: 900;
    color: var(--color-dark);
    margin-bottom: 6px;
}

.modal-desc {
    font-size: 0.9rem;
    color: var(--color-gray);
    margin-bottom: 20px;
}

.order-receipt-box {
    background: #faf7f5;
    border-radius: var(--radius-md);
    padding: 16px;
    text-align: left;
    margin-bottom: 24px;
    border: 1px solid var(--color-gray-light);
}

.order-receipt-box h4 {
    font-size: 0.85rem;
    font-weight: 800;
    margin-bottom: 10px;
    color: var(--color-dark);
    border-bottom: 1px solid var(--color-gray-light);
    padding-bottom: 6px;
}

.receipt-list {
    list-style: none;
}

.receipt-list li {
    font-size: 0.8rem;
    margin-bottom: 6px;
    color: var(--color-dark);
    display: flex;
    justify-content: space-between;
}

.receipt-list li strong {
    color: var(--color-gray);
    font-weight: 600;
}

.highlight-total {
    color: var(--color-primary);
    font-weight: 800;
    font-size: 0.95rem;
}

.modal-close-btn {
    background: var(--color-dark);
    color: var(--color-light);
    border: none;
    border-radius: var(--radius-sm);
    padding: 12px 30px;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.modal-close-btn:hover {
    background: #251310;
}

/* ==========================================================================
   ANIMATIONS
   ========================================================================== */
@keyframes pulse {
    0% {
        box-shadow: 0 0 0 0 rgba(212, 77, 50, 0.4);
    }
    70% {
        box-shadow: 0 0 0 8px rgba(212, 77, 50, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(212, 77, 50, 0);
    }
}

/* ==========================================================================
   RESPONSIVE DESIGN (DESKTOP & TABLET CONSTRAINTS)
   ========================================================================== */
@media (min-width: 768px) {
    /* Main Layout bounds for visual premium center column */
    .poster-section,
    .checkout-section,
    .info-section,
    .main-footer,
    .header-container,
    .sticky-cta-bar {
        max-width: var(--content-max-width);
    }
    
    .checkout-section {
        border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    }
    
    .main-footer {
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
        margin-top: 30px;
        padding-bottom: 40px; /* Restore regular bottom padding on desktop */
    }

    .sticky-cta-bar {
        left: 50%;
        transform: translate(-50%, 100%);
        width: var(--content-max-width);
        border-radius: var(--radius-md) var(--radius-md) 0 0;
        border-left: 1px solid rgba(212, 77, 50, 0.15);
        border-right: 1px solid rgba(212, 77, 50, 0.15);
    }

    .sticky-cta-bar.visible {
        transform: translate(-50%, 0);
    }

    /* Grid layouts */
    .plan-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .form-grid {
        grid-template-columns: 1.1fr 0.9fr;
    }

    .info-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .mobile-menu-toggle {
        display: none;
    }
    
    .mobile-nav-overlay {
        display: none;
    }
}

@media (max-width: 767px) {
    .nav-links {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
}