/* ==========================================================================
   Sarmad Global Chartered Accountants & Systems Partner
   Core Design System & Stylesheet (Vanilla CSS)
   ========================================================================== */

/* Import Google Fonts - Refined Serif & Clean Sans-Serif */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Lora:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

:root {
    /* Color Tokens */
    --clr-primary-dark: #0D131A;    /* Deep Onyx Navy */
    --clr-secondary-dark: #1E2631;  /* Sleek Slate */
    --clr-accent-gold: #D4AF37;     /* Warm Metallic Gold */
    --clr-accent-gold-hover: #C5A059; /* Rich Burnished Gold */
    --clr-bg-light: #F7F9FB;         /* Elegant Alabaster */
    --clr-text-light: #F7F9FB;       /* High-contrast Light Text */
    --clr-text-dark: #1E2631;        /* Deep Charcoal Text */
    --clr-text-muted: #64748B;       /* Neutral Slate */
    --clr-border: rgba(212, 175, 55, 0.15); /* Warm Gold Hint */
    --clr-glass-bg: rgba(30, 38, 49, 0.7);  /* Glassmorphic Dark Fill */
    --clr-success: #2E7D32;         /* Trusting Emerald Green */

    /* Typography Scale */
    --font-heading: 'Lora', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    /* Spacing & Layout */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1.0rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2.5rem;
    --spacing-xl: 4.5rem;
    --max-width: 1200px;

    /* Border Radius & Shadows */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.15), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Animation Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

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

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.65;
    color: var(--clr-text-dark);
    background-color: var(--clr-bg-light);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    color: var(--clr-primary-dark);
    line-height: 1.25;
    font-weight: 500;
}

h1 {
    font-size: 2.75rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 2.0rem;
    margin-bottom: var(--spacing-md);
    position: relative;
    padding-bottom: var(--spacing-xs);
}

h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 2px;
    background-color: var(--clr-accent-gold);
}

h3 {
    font-size: 1.4rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
    color: var(--clr-text-dark);
}

a {
    color: var(--clr-primary-dark);
    text-decoration: none;
    transition: var(--transition-fast);
}

a:hover {
    color: var(--clr-accent-gold);
}

/* Layout Containers */
.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.section {
    padding: var(--spacing-xl) 0;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
}

.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-md);
}

/* Global Header Components */
.header-top {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
    font-size: 0.85rem;
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--clr-border);
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-top-left a, .header-top-right a {
    color: var(--clr-text-light);
    margin-right: var(--spacing-md);
}

.header-top-left a:hover, .header-top-right a:hover {
    color: var(--clr-accent-gold);
}

.navbar {
    background-color: rgba(13, 19, 26, 0.95);
    backdrop-filter: blur(10px);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--clr-border);
    padding: var(--spacing-sm) 0;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-brand-group {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 0 0 auto;
}

.logo {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--clr-text-light);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo span {
    color: var(--clr-accent-gold);
}

.nav-accreditation {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex: 0 0 auto;
    transition: var(--transition-smooth);
}

.nav-accreditation:hover {
    transform: translateY(-1px);
}

.nav-accreditation img {
    display: block;
    object-fit: contain;
}

.nav-accreditation-icaew {
    width: 48px;
    height: 48px;
    background: #ffffff;
    border-radius: var(--radius-sm);
    padding: 5px;
    box-shadow: var(--shadow-sm);
}

.nav-accreditation-icaew img {
    width: 38px;
    height: 38px;
}

.nav-accreditation-acca img {
    width: 44px;
    height: 44px;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
    justify-content: flex-end;
    gap: clamp(0.65rem, 1.2vw, var(--spacing-md));
    row-gap: var(--spacing-xs);
}

.nav-links a {
    color: var(--clr-text-light);
    font-weight: 500;
    font-size: 0.95rem;
    white-space: nowrap;
}

.nav-links a:hover {
    color: var(--clr-accent-gold);
}

.nav-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--clr-secondary-dark);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    list-style: none;
    min-width: 260px;
    padding: var(--spacing-xs) 0;
    z-index: 10;
}

.dropdown-menu li a {
    display: block;
    padding: var(--spacing-xs) var(--spacing-md);
    color: var(--clr-text-light);
}

.dropdown-menu li a:hover {
    background-color: rgba(212, 175, 55, 0.1);
    color: var(--clr-accent-gold);
}

.nav-dropdown:hover .dropdown-menu {
    display: block;
}

/* Buttons System */
.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: center;
}

.btn-primary {
    background-color: var(--clr-accent-gold);
    color: var(--clr-primary-dark);
}

.btn-primary:hover {
    background-color: var(--clr-accent-gold-hover);
    color: var(--clr-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background-color: transparent;
    color: var(--clr-text-light);
    border: 1px solid var(--clr-accent-gold);
}

.btn-outline:hover {
    background-color: var(--clr-accent-gold);
    color: var(--clr-primary-dark);
    transform: translateY(-2px);
}

.btn-dark {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
    border: 1px solid var(--clr-border);
}

.btn-dark:hover {
    background-color: var(--clr-secondary-dark);
    color: var(--clr-accent-gold);
    transform: translateY(-2px);
}

/* Home Split Hero Section */
.hero-split {
    display: flex;
    min-height: calc(85vh - 100px);
}

.hero-half {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition-smooth);
}

.hero-half::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.05;
    z-index: 1;
    pointer-events: none;
    background-size: cover;
    background-position: center;
}

/* Geometric pattern representation for Face A & B backgrounds */
.hero-half-a::before {
    background-image: radial-gradient(var(--clr-accent-gold) 1px, transparent 1px);
    background-size: 24px 24px;
}

.hero-half-b::before {
    background-image: linear-gradient(45deg, var(--clr-accent-gold) 12%, transparent 12%, transparent 88%, var(--clr-accent-gold) 88%), linear-gradient(135deg, var(--clr-accent-gold) 12%, transparent 12%, transparent 88%, var(--clr-accent-gold) 88%);
    background-size: 30px 30px;
}

.hero-half-a {
    background-color: var(--clr-secondary-dark);
    color: var(--clr-text-light);
    border-right: 1px solid var(--clr-border);
}

.hero-half-b {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
}

.hero-half:hover {
    flex: 1.15;
}

.hero-content {
    max-width: 500px;
    z-index: 2;
}

.hero-half h1 {
    color: var(--clr-text-light);
    margin-bottom: var(--spacing-md);
}

.hero-half h1 span {
    color: var(--clr-accent-gold);
}

.hero-half p {
    color: rgba(247, 249, 251, 0.8);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
}

/* Trust Strip */
.trust-strip {
    background-color: var(--clr-secondary-dark);
    border-bottom: 1px solid var(--clr-border);
    padding: var(--spacing-md) 0;
    color: var(--clr-text-light);
}

.trust-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    font-weight: 500;
    color: rgba(247, 249, 251, 0.9);
}

.trust-item svg {
    color: var(--clr-accent-gold);
    width: 20px;
    height: 20px;
}

/* Strategic Grid Sections */
.bg-dark-section {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
}

.bg-dark-section h2, .bg-dark-section h3 {
    color: var(--clr-text-light);
}

.bg-dark-section p {
    color: rgba(247, 249, 251, 0.85);
}

.card {
    background-color: var(--clr-bg-light);
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-smooth);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
    border-color: var(--clr-accent-gold);
}

.card-dark {
    background-color: var(--clr-secondary-dark);
    border: 1px solid var(--clr-border);
    color: var(--clr-text-light);
}

.card-dark p {
    color: rgba(247, 249, 251, 0.8);
}

.card-icon {
    color: var(--clr-accent-gold);
    width: 42px;
    height: 42px;
    margin-bottom: var(--spacing-sm);
}

/* Glassmorphism Accents */
.glass-panel {
    background-color: var(--clr-glass-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

/* Shared Inner Page Styles */
.inner-hero {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg) 0;
    border-bottom: 1px solid var(--clr-border);
    position: relative;
}

.inner-hero h1 {
    color: var(--clr-text-light);
    margin-bottom: var(--spacing-sm);
}

.inner-hero h1 span {
    color: var(--clr-accent-gold);
}

.inner-hero .lead {
    font-size: 1.2rem;
    color: rgba(247, 249, 251, 0.85);
    max-width: 800px;
    margin-bottom: var(--spacing-md);
}

.breadcrumbs {
    display: flex;
    gap: var(--spacing-xs);
    font-size: 0.85rem;
    color: var(--clr-accent-gold);
    margin-bottom: var(--spacing-md);
}

.breadcrumbs a {
    color: rgba(247, 249, 251, 0.7);
}

.breadcrumbs a:hover {
    color: var(--clr-accent-gold);
}

/* Accordion FAQs */
.faq-section {
    background-color: var(--clr-bg-light);
}

.faq-container {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: #fff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition-fast);
}

.faq-question {
    width: 100%;
    background: none;
    border: none;
    text-align: left;
    padding: var(--spacing-md);
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 500;
    color: var(--clr-primary-dark);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

.faq-question:hover {
    background-color: rgba(212, 175, 55, 0.05);
    color: var(--clr-accent-gold);
}

.faq-answer {
    padding: 0 var(--spacing-md);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-smooth) ease-out;
    background-color: #fff;
}

.faq-answer p {
    padding-bottom: var(--spacing-md);
    color: var(--clr-text-dark);
    font-size: 0.95rem;
}

.faq-item.active .faq-answer {
    max-height: 500px; /* arbitrary height to allow expansion transition */
}

.faq-icon {
    font-size: 1.5rem;
    color: var(--clr-accent-gold);
    transition: var(--transition-smooth);
}

.faq-item.active .faq-icon {
    transform: rotate(45deg);
}

/* Interactive Calculator Elements */
.calc-container {
    background-color: #fff;
    border: 1px solid var(--clr-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-lg);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--clr-primary-dark);
}

.form-control {
    width: 100%;
    padding: 0.75rem 1.0rem;
    border: 1px solid rgba(0, 0, 0, 0.1);
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-size: 1rem;
    transition: var(--transition-fast);
}

.form-control:focus {
    outline: none;
    border-color: var(--clr-accent-gold);
    box-shadow: 0 0 0 3px rgba(212, 175, 55, 0.15);
}

.calc-result {
    background-color: rgba(212, 175, 55, 0.08);
    border-left: 4px solid var(--clr-accent-gold);
    border-radius: var(--radius-sm);
    padding: var(--spacing-md);
    margin-top: var(--spacing-md);
    display: none;
}

/* Secure File Upload portal element */
.upload-zone {
    border: 2px dashed var(--clr-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
    text-align: center;
    background-color: rgba(247, 249, 251, 0.5);
    cursor: pointer;
    transition: var(--transition-smooth);
}

.upload-zone:hover, .upload-zone.dragover {
    background-color: rgba(212, 175, 55, 0.05);
    border-color: var(--clr-accent-gold);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--clr-accent-gold);
    margin-bottom: var(--spacing-sm);
}

/* Standard Footer */
footer {
    background-color: var(--clr-primary-dark);
    color: var(--clr-text-light);
    padding: var(--spacing-xl) 0 var(--spacing-md) 0;
    border-top: 1px solid var(--clr-border);
    font-size: 0.9rem;
}

footer h4 {
    color: var(--clr-text-light);
    margin-bottom: var(--spacing-md);
    font-size: 1.15rem;
}

footer a {
    color: rgba(247, 249, 251, 0.7);
}

footer a:hover {
    color: var(--clr-accent-gold);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1.5fr 1.5fr 1.5fr;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: var(--spacing-xs);
}

.footer-compliance-bar {
    border-top: 1px solid rgba(247, 249, 251, 0.1);
    padding-top: var(--spacing-md);
    font-size: 0.75rem;
    color: rgba(247, 249, 251, 0.5);
    line-height: 1.8;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
}

.footer-bottom-links a {
    margin-left: var(--spacing-md);
}

/* Accreditation Logos & Badges */
.footer-logos {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin: var(--spacing-md) 0 var(--spacing-lg) 0;
    flex-wrap: wrap;
    align-items: center;
}

.accreditation-logo-card {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    background: #ffffff;
    border: 1px solid rgba(247, 249, 251, 0.12);
    border-radius: var(--radius-sm);
    padding: 0.65rem 0.85rem;
    margin: 0;
    min-height: 74px;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
}

.accreditation-logo-card img {
    display: block;
    object-fit: contain;
    flex: 0 0 auto;
}

.accreditation-logo-card img[src$="acca-logo.svg"] {
    width: 52px;
    height: 52px;
}

.accreditation-logo-card img[src$="icaew-logo.jpg"] {
    width: 82px;
    height: 62px;
}

.accreditation-logo-card span {
    display: block;
    color: var(--clr-primary-dark);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.25;
    max-width: 120px;
}

.accreditation-logo-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Mobile Responsive Adjustments */
@media (max-width: 992px) {
    h1 { font-size: 2.2rem; }
    h2 { font-size: 1.7rem; }
    .navbar .container { align-items: flex-start; }
    .nav-links { flex-wrap: wrap; }
    .hero-split { flex-direction: column; }
    .hero-half { padding: var(--spacing-lg) var(--spacing-md); }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .grid-2, .grid-3, .grid-4 {
        grid-template-columns: 1fr;
    }
    .footer-grid { grid-template-columns: 1fr; }
    .header-top .container { flex-direction: column; gap: var(--spacing-xs); text-align: center; }
}