:root {
    --alpha-red: #BF1E2E;
    --alpha-red-glow: rgba(191, 30, 46, 0.08);
    --alpha-dark: #0F172A;
    --alpha-slate: #64748B;
    --alpha-bg: #F8FAFC;
    --glass-bg: rgba(255, 255, 255, 0.96);
    --glass-border: rgba(226, 232, 240, 0.8);
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 8px;
}

/* --- IMMUTABLE VIEWPORT SAFEGUARDS --- */
html,
body {
    margin: 0;
    padding: 0;
    width: 100%;
    background-color: var(--alpha-bg);
    color: var(--alpha-dark);
    font-family: 'Plus Jakarta Sans', sans-serif;
    -webkit-font-smoothing: antialiased;
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: #fff;
    overflow-x: hidden;
    padding-bottom: 0;

}

@media (min-width: 992px) {
    body {
        padding-top: 75px;
        padding-bottom: 0px;
    }

    .mobile-bottom-nav {
        position: fixed;

        left: 0;
        right: 0;
        bottom: 0;

        width: 100%;

        z-index: 9999;


        padding: 10px 0 calc(10px + env(safe-area-inset-bottom));

        box-shadow: 0 -5px 20px rgba(0, 0, 0, 0.06);

        border-top: 1px solid rgba(0, 0, 0, 0.05);

        transform: translateZ(0);
        -webkit-transform: translateZ(0);
    }
}

/* --- HARDWARE-ACCELERATED IN-OUT VIEWPORT ANIMATIONS --- */
.reveal-section {
    opacity: 0;
    transform: scale(0.96) translateY(40px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1),
        transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: transform, opacity;
}

.reveal-section.visible {
    opacity: 1;
    transform: scale(1) translateY(0);
}

.reveal-section.exit-out {
    opacity: 0;
    transform: scale(0.96) translateY(-40px);
}

/* --- IMMOVABLE TOP NAVBAR HEADER --- */
.navbar {
    position: fixed !important;
    top: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    height: 72px;
    margin: 0 !important;
    background: var(--glass-bg) !important;
    border-bottom: 1px solid var(--glass-border) !important;
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 9999 !important;
    display: flex;
    align-items: center;
}

.navbar-brand {
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -0.5px;
}

.nav-link {
    font-weight: 600;
    color: #475569 !important;
    font-size: 0.92rem;
    padding: 8px 16px !important;
    border-radius: var(--radius-sm);
    transition: all 0.25s ease;
}

.nav-link:hover {
    color: var(--alpha-red) !important;
    background: var(--alpha-red-glow);
}

.btn-header-join {
    background-color: var(--alpha-dark);
    color: #ffffff !important;
    font-weight: 700;
    border-radius: 30px;
    padding: 8px 20px;
    font-size: 0.85rem;
    border: 1px solid transparent;
    transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

.btn-header-join:hover {
    background-color: var(--alpha-red);
    transform: scale(1.03);
    box-shadow: 0 6px 20px rgba(191, 30, 46, 0.25);
}

/* --- RESPONSIVE APP-STYLE BOTTOM NAVIGATION --- */
.mobile-bottom-nav {
    position: fixed !important;
    bottom: 0 !important;
    left: 0 !important;
    right: 0 !important;
    width: 100% !important;
    height: 80px;
    background: rgba(255, 255, 255, 0.98) !important;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-top: 1px solid var(--glass-border);
    z-index: 9999 !important;
    box-shadow: 0 -6px 25px rgba(0, 0, 0, 0.04);
    display: flex !important;
    justify-content: space-around;
    align-items: flex-end;
    padding: 0 8px 8px 8px;
}

.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-decoration: none !important;
    color: var(--alpha-slate);
    font-size: 0.72rem;
    font-weight: 600;
    width: 20%;
    height: 100%;
    padding-bottom: 6px;
    transition: color 0.2s ease;
}

.mobile-nav-item i {
    font-size: 1.25rem;
    margin-bottom: 4px;
    transition: transform 0.2s ease;
}

.mobile-nav-item:hover i {
    transform: translateY(-2px);
}

.mobile-nav-item.active,
.mobile-nav-item:hover {
    color: var(--alpha-red);
}

.mobile-nav-center-wrap {
    position: relative;
    width: 20%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-end;
}

.mobile-nav-center-btn {
    width: 54px;
    height: 54px;
    background: var(--alpha-red);
    color: #fff !important;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 6px 16px rgba(191, 30, 46, 0.35);
    border: 4px solid #fff;
    position: absolute;
    top: -20px;
    transition: transform 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.mobile-nav-center-btn:hover {
    transform: scale(1.1) rotate(15deg);
}

.mobile-center-label {
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--alpha-slate);
    padding-bottom: 6px;
}

/* --- HERO SPLIT & 3D GALLERY ENGINE --- */
.hero-section {
    padding: 40px 0 60px 0;
    background: radial-gradient(120% 80% at 50% 0%, rgba(247, 147, 30, 0.05) 0%, rgba(255, 255, 255, 0) 100%);
}

@media (min-width: 992px) {
    .hero-section {
        padding: 80px 0 100px 0;
    }
}

.hero-title {
    font-size: calc(2.2rem + 1.6vw);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -1.5px;
}

.hero-subtitle {
    color: var(--alpha-slate);
    font-size: 1.05rem;
    line-height: 1.6;
    max-width: 540px;
}

.btn-alpha-primary {
    background: var(--alpha-red);
    color: white !important;
    padding: 14px 28px;
    font-weight: 700;
    border-radius: 30px;
    border: none;
    box-shadow: 0 4px 12px rgba(191, 30, 46, 0.2);
    transition: all 0.25s ease;
}

.btn-alpha-primary:hover {
    background: #9E1925;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(191, 30, 46, 0.3);
}

.btn-alpha-secondary {
    background: #fff;
    color: var(--alpha-dark) !important;
    padding: 14px 28px;
    font-weight: 700;
    border-radius: 30px;
    border: 1px solid #E2E8F0;
    transition: all 0.25s ease;
}

.btn-alpha-secondary:hover {
    background: var(--alpha-bg);
    transform: translateY(-1px);
}

/* ADVANCED 3D SPACE HOVER MECHANICS */
.split-collection-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    perspective: 1000px;
}

.collection-wrapper {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 15px 35px rgba(15, 23, 42, 0.08);
    aspect-ratio: 4 / 5;
    background-color: #E2E8F0;
    transform-style: preserve-3d;
    transition: transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
}

.collection-wrapper:nth-child(2) {
    margin-top: 24px;
}

.collection-wrapper:hover {
    transform: rotateX(6deg) rotateY(-6deg) translate3d(0, -8px, 15px);
    box-shadow: -10px 25px 40px rgba(15, 23, 42, 0.15);
}

.collection-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.collection-wrapper:hover .collection-img {
    transform: scale(1.03);
}

.collection-badge {
    position: absolute;
    bottom: 16px;
    left: 16px;
    background: rgba(15, 23, 42, 0.85);
    color: #fff;
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    padding: 6px 16px;
    font-size: 0.72rem;
    font-weight: 700;
    border-radius: 30px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    transform: translateZ(20px);
}

/* --- BRAND PARTNER STRIP --- */
.brand-strip {
    padding: 30px 0;
    background-color: #ffffff;
    border-top: 1px solid #EEF0F4;
    border-bottom: 1px solid #EEF0F4;
}

.brand-item {
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: #94A3B8;
    font-size: 0.85rem;
}

/* --- STEP MATRIX BLOCKS & INTERACTION --- */
.step-card {
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-md);
    background: #fff;
    padding: 35px 24px;
    height: 100%;
    position: relative;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.step-card:hover {
    border-color: var(--alpha-red);
    box-shadow: 0 15px 35px var(--alpha-red-glow);
    transform: translateY(-6px);
}

.step-number {
    position: absolute;
    top: 24px;
    right: 24px;
    font-size: 0.85rem;
    font-weight: 800;
    color: #CBD5E1;
    transition: color 0.3s;
}

.step-card:hover .step-number {
    color: var(--alpha-red);
}

.step-icon-box {
    width: 48px;
    height: 48px;
    background: var(--alpha-red-glow);
    color: var(--alpha-red);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    margin-bottom: 24px;
    font-size: 1.25rem;
    transition: transform 0.3s ease;
}

.step-card:hover .step-icon-box {
    transform: scale(1.1) rotate(-8deg);
}

/* --- PLATFORM STATS STRIP --- */
.stat-card {
    background: #ffffff;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-md);
    padding: 30px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.01);
    transition: border-color 0.3s;
}

.stat-card:hover {
    border-color: var(--alpha-red);
}

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--alpha-dark);
    letter-spacing: -1px;
}

/* --- LEVEL 1 TO 9 DATASHEET ARCHITECTURE --- */
.matrix-container-box {
    background: #ffffff;
    border: 1px solid #E2E8F0;
    border-radius: var(--radius-lg);
    padding: 35px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.02);
}

.table-matrix-alpha {
    margin-bottom: 0;
}

.table-matrix-alpha th {
    background: var(--alpha-bg);
    color: var(--alpha-slate);
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 16px 20px;
    border: none;
}

.table-matrix-alpha td {
    padding: 18px 20px;
    font-size: 0.92rem;
    vertical-align: middle;
    border-bottom: 1px solid #F1F5F9;
}

.table-matrix-alpha tr:last-child td {
    border-bottom: none;
}

.level-badge-pill {
    background: var(--alpha-dark);
    color: #fff;
    font-size: 0.72rem;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 30px;
}

.level-badge-pill.top-tier {
    background: var(--alpha-red);
}

/* --- ESTIMATOR INTERACTIVE MODULE --- */
.estimator-card {
    background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
    color: #fff;
    border-radius: var(--radius-lg);
    padding: 40px;
    position: relative;
    overflow: hidden;
}

.estimator-card::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: var(--alpha-red);
    filter: blur(120px);
    opacity: 0.12;
}

/* --- ACCORDION FAQ SYSTEM --- */
.accordion-item {
    border: 1px solid #E2E8F0 !important;
    border-radius: var(--radius-md) !important;
    margin-bottom: 14px;
    overflow: hidden;
    background: #fff;
    transition: border-color 0.3s;
}

.accordion-item:hover {
    border-color: #CBD5E1 !important;
}

.accordion-button {
    padding: 20px;
    font-weight: 700;
    color: var(--alpha-dark);
    background: #fff;
    box-shadow: none !important;
}

.accordion-button:not(.collapsed) {
    background-color: var(--alpha-bg);
    color: var(--alpha-red);
}

/* --- CORPORATE FOOTER BLOCK --- */
.corporate-footer {
    background-color: #0B0F19;
    color: #94A3B8;
    border-top: 1px solid #1E293B;
    padding: 70px 0 35px 0;
    font-size: 0.9rem;
}

.footer-heading {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 20px;
    color: #ffffff;
}

.footer-links a {
    color: #94A3B8;
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-links a:hover {
    color: #fff;
}

/* --- AUTH MODAL DUAL FLIP --- */
.auth-modal-dialog {
    max-width: 420px;
    margin: 1.75rem auto;
}

.auth-modal-content {
    background: transparent;
    border: none;
}

.flip-card {
    perspective: 1200px;
    width: 100%;
    min-height: 560px;
}

.flip-card-inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card-inner {
    transform: rotateY(180deg);
}

.card-front,
.card-back {
    position: absolute;
    width: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    background: #ffffff;
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    box-shadow: 0 25px 50px rgba(15, 23, 42, 0.15);
}

.card-back {
    transform: rotateY(180deg);
}

.btn-google {
    background: #ffffff;
    color: #334155;
    border: 1px solid #E2E8F0;
    font-weight: 600;
    font-size: 0.9rem;
    padding: 11px 16px;
    border-radius: 30px;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: background 0.2s, transform 0.2s;
}

.btn-google:hover {
    background: var(--alpha-bg);
    transform: scale(0.99);
}

.auth-divider {
    display: flex;
    align-items: center;
    text-align: center;
    color: #94A3B8;
    font-size: 0.75rem;
    margin: 24px 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid #E2E8F0;
}

.auth-divider:not(:empty)::before {
    margin-right: 1em;
}

.auth-divider:not(:empty)::after {
    margin-left: 1em;
}

.form-control {
    border-radius: var(--radius-sm);
    padding: 11px 16px;
    border: 1px solid #CBD5E1;
    font-size: 0.92rem;
    transition: all 0.2s;
}

.form-control:focus {
    border-color: var(--alpha-red);
    box-shadow: 0 0 0 4px var(--alpha-red-glow);
}


@media (min-width: 992px) {

    .mobile-bottom-nav {
        display: none !important;
    }
}

/* Fix for Modal Stability and Mobile Scrolling */
.auth-modal-dialog {
    /* Ensures the modal doesn't get pushed around by background scrolling */
    display: flex;
    align-items: center;
    min-height: calc(100% - 3.5rem);
    margin: 1.75rem auto;
}

@media (max-width: 576px) {
    .auth-modal-dialog {
        margin: 0.5rem;
        /* Smaller margins on mobile */
        min-height: calc(100% - 1rem);
    }

    .auth-modal-content {
        /* Limits height to 90% of the screen height */
        max-height: 90vh;
        overflow-y: auto;
        /* Makes the content scrollable */
        overflow-x: hidden;
        border-radius: 20px;
    }

    /* Adjust the flip card to work with the scrollable container */
    .flip-card,
    .flip-card-inner,
    .card-front,
    .card-back {
        height: auto !important;
        min-height: 100%;
    }

    .card-front,
    .card-back {
        position: relative !important;
        /* Standard flow for scrolling */
        backface-visibility: hidden;
        padding: 20px;
    }

    /* Ensure the back face is hidden correctly during scroll */
    .card-back {
        display: none;
    }

    .flipped .card-front {
        display: none;
    }

    .flipped .card-back {
        display: block;
    }
}

/* Base Modal Styling Fixes */
.modal-content {
    border: none;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.25);
}