/* ==========================================================================
   CSS Variables & Tokens
   ========================================================================== */
:root {
    /* Brand Colors (Derived from Logo requirements) */
    --clr-pink: #FF3366;
    --clr-blue: #00C6FF;
    --clr-purple-bg: #EAE6FF;
    
    /* Social Colors */
    --clr-insta: #E1306C;
    --clr-tiktok: #000000;
    --clr-fb: #1877F2;
    --clr-wa: #25D366;
    --clr-instapay: #6A1B9A;

    /* Text */
    --clr-text-main: #2D3436;
    --clr-text-muted: #636E72;
    --clr-white: #FFFFFF;

    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.65);
    --glass-border: rgba(255, 255, 255, 0.8);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);
    --glass-blur: blur(12px);

    /* Layout & Spacing */
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    
    --sp-xs: 8px;
    --sp-sm: 16px;
    --sp-md: 24px;
    --sp-lg: 32px;
}

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

body {
    font-family: 'Cairo', sans-serif;
    background-color: var(--clr-purple-bg);
    color: var(--clr-text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    padding: var(--sp-md) var(--sp-sm);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
    position: relative;
    overflow-x: hidden;
}

/* ==========================================================================
   Background Mesh Network
   ========================================================================== */
.background-mesh {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -1;
    overflow: hidden;
    background: var(--clr-purple-bg);
}

.shape {
    position: absolute;
    filter: blur(80px);
    opacity: 0.6;
    border-radius: 50%;
    animation: float 20s infinite ease-in-out alternate;
}

.shape-1 {
    top: -10%;
    left: -10%;
    width: 300px;
    height: 300px;
    background: var(--clr-pink);
}

.shape-2 {
    bottom: -10%;
    right: -10%;
    width: 400px;
    height: 400px;
    background: var(--clr-blue);
    animation-delay: -5s;
}

.shape-3 {
    top: 40%;
    left: 50%;
    width: 250px;
    height: 250px;
    background: #FFF;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0) scale(1); }
    100% { transform: translate(30px, -50px) scale(1.1); }
}

/* ==========================================================================
   Layout
   ========================================================================== */
.container {
    width: 100%;
    max-width: 500px; /* Mobile-first optimized max width */
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
    z-index: 1;
}

/* ==========================================================================
   Components: Glass Card
   ========================================================================== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    padding: var(--sp-md);
}

/* ==========================================================================
   Header & Branding
   ========================================================================== */
header {
    text-align: center;
    padding: var(--sp-lg) var(--sp-md);
}

.logo-wrapper {
    width: 120px;
    height: 120px;
    margin: 0 auto var(--sp-sm);
    border-radius: 50%;
    background: var(--clr-white);
    padding: var(--sp-xs);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.brand-logo {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}

header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--clr-text-main);
    margin-bottom: 4px;
}

header p {
    color: var(--clr-text-muted);
    font-size: 1rem;
    font-weight: 600;
}

/* ==========================================================================
   Social Media Links
   ========================================================================== */
.links-grid {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
}

.glass-btn {
    border-radius: var(--radius-md);
    padding: var(--sp-sm);
    display: flex;
    align-items: center;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
    box-shadow: var(--glass-shadow);
    transition: transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.3s ease, box-shadow 0.3s ease;
    border: 2px solid transparent;
}

.glass-btn:active {
    transform: scale(0.97);
}

.glass-btn:hover {
    filter: brightness(1.1);
}

.btn-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-left: var(--sp-sm);
    color: inherit;
}

.btn-icon svg {
    width: 24px;
    height: 24px;
}

.btn-text {
    flex-grow: 1;
    text-align: right;
}

/* Brand specific styling */
.whatsapp-btn {
    background: var(--clr-wa);
    color: var(--clr-white);
}

.facebook-btn {
    background: var(--clr-fb);
    color: var(--clr-white);
}

.instagram-btn {
    background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
    color: var(--clr-white);
}

.tiktok-btn {
    background: #000000;
    color: var(--clr-white);
}

.whatsapp-channel-btn {
    background: var(--clr-white);
    color: var(--clr-wa);
    border-color: var(--clr-wa);
}

/* ==========================================================================
   InstaPay Card
   ========================================================================== */
.instapay-card {
    border-top: 4px solid var(--clr-instapay);
    text-align: center;
}

.instapay-header {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-xs);
    color: var(--clr-instapay);
    margin-bottom: var(--sp-sm);
}

.instapay-header h2 {
    font-size: 1.3rem;
    font-weight: 800;
}

.instapay-header i {
    font-size: 1.5rem;
}

.instapay-details {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--sp-sm);
}

.account-name {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--clr-text-main);
}

.copy-box {
    display: flex;
    align-items: center;
    background: var(--clr-white);
    border-radius: var(--radius-sm);
    padding: var(--sp-xs) var(--sp-xs) var(--sp-xs) var(--sp-sm);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.05);
    width: 100%;
    max-width: 300px;
    justify-content: space-between;
}

.account-number {
    font-size: 1.3rem;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--clr-text-main);
    direction: ltr; /* Ensure numbers render LTR correctly */
}

.copy-btn {
    background: var(--clr-purple-bg);
    border: none;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    color: var(--clr-instapay);
    font-size: 1.2rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.copy-btn:active {
    transform: scale(0.9);
}

/* ==========================================================================
   Smart Request Form
   ========================================================================== */
.request-card {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
}

.request-header {
    display: flex;
    align-items: center;
    gap: var(--sp-xs);
    color: var(--clr-pink);
}

.request-header h2 {
    font-size: 1.3rem;
    font-weight: 800;
}

.request-header i {
    font-size: 1.4rem;
}

.subtitle {
    color: var(--clr-text-muted);
    font-size: 0.95rem;
}

.glass-form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
    margin-top: var(--sp-xs);
}

.input-group input {
    width: 100%;
    background: var(--clr-white);
    border: 1px solid rgba(0,0,0,0.1);
    padding: 14px var(--sp-sm);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1rem;
    color: var(--clr-text-main);
    outline: none;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.input-group input:focus {
    border-color: var(--clr-blue);
    box-shadow: 0 0 0 3px rgba(0, 198, 255, 0.2);
}

.input-group input.input-error {
    border-color: #ef4444 !important;
    background-color: rgba(239, 68, 68, 0.04) !important;
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.25) !important;
    animation: shakeInput 0.35s ease;
}

@keyframes shakeInput {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-5px); }
    40%, 80% { transform: translateX(5px); }
}

.hidden-file-input {
    display: none;
}

.file-upload-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-xs);
    background: rgba(255, 255, 255, 0.5);
    border: 2px dashed rgba(0,0,0,0.15);
    padding: var(--sp-sm);
    border-radius: var(--radius-sm);
    color: var(--clr-text-muted);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.file-upload-btn:active {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--clr-blue);
}

.submit-btn {
    background: linear-gradient(135deg, var(--clr-pink), #FF6B81);
    color: var(--clr-white);
    border: none;
    padding: 16px;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-xs);
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(255, 51, 102, 0.3);
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.submit-btn:active {
    transform: scale(0.97);
}

.submit-btn.success {
    background: var(--clr-wa);
    box-shadow: 0 4px 15px rgba(37, 211, 102, 0.3);
}

/* ==========================================================================
   Footer
   ========================================================================== */
footer {
    text-align: center;
    padding-bottom: var(--sp-md);
    color: var(--clr-text-muted);
    font-size: 0.85rem;
}

/* ==========================================================================
   Animations
   ========================================================================== */
.animate-fade-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeInUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes fadeInUp {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes scalePop {
    0% { transform: scale(1); }
    50% { transform: scale(1.3) rotate(10deg); color: #25D366; }
    100% { transform: scale(1); color: #25D366; }
}

.success-pop {
    animation: scalePop 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards;
}

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

.fa-spin {
    animation: spin 1s linear infinite;
}

/* Fallback logic for JS replacing icons dynamically */
.hidden-fa {
    display: none;
}
.hidden-fa.fa-check, .hidden-fa.fa-spinner, .hidden-fa.fa-paper-plane {
    display: inline-block;
}
.hidden-fa.fa-check + .inline-svg-icon, 
.hidden-fa.fa-spinner + .inline-svg-icon,
.hidden-fa.fa-paper-plane + .inline-svg-icon {
    display: none;
}

/* ==========================================================================
   Intelligent Dark Mode
   ========================================================================== */
body.dark-mode {
    --clr-purple-bg: #0F172A; /* Deep indigo/charcoal */
    --clr-text-main: #F8FAFC; /* Light gray for readability */
    --clr-text-muted: #94A3B8; /* Slate gray */
    --clr-white: #1E293B; /* Darker card background elements */
    --glass-bg: rgba(30, 41, 59, 0.65);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

body.dark-mode .shape-3 {
    background: #334155; /* Dim the white shape to prevent glaring */
}

/* CSS Transitions for smooth auto-switching */
body, .glass-card, .background-mesh, .shape, .glass-btn, .submit-btn, .file-upload-btn, .copy-box, .input-group input, .copy-btn, .whatsapp-channel-btn, p, h1, h2, span, i {
    transition: background-color 0.4s ease, background 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease, transform 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.theme-toggle {
    position: absolute;
    top: var(--sp-sm);
    right: var(--sp-sm);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: 50%;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--clr-text-main);
    cursor: pointer;
    box-shadow: var(--glass-shadow);
    z-index: 100;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.95);
}

/* ==========================================================================
   Desktop Adjustments
   ========================================================================== */
@media (min-width: 768px) {
    .container {
        max-width: 600px;
    }
    
    .glass-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(0,0,0,0.15);
    }
    
    .submit-btn:hover {
        transform: translateY(-2px);
        box-shadow: 0 6px 20px rgba(255, 51, 102, 0.4);
    }
    
    .copy-btn:hover {
        background: var(--clr-white);
        box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    }
}

/* ==========================================================================
   Mobile Adjustments
   ========================================================================== */
@media (max-width: 768px) {
    /* Prevent horizontal scrolling */
    body {
        overflow-x: hidden;
    }
    
    .container, .glass-card, .links-grid, .instapay-card, .request-card, .glass-btn {
        max-width: 100%;
        box-sizing: border-box;
    }

    /* Scale the logo */
    .logo-wrapper {
        width: 100%;
        height: auto;
        background: transparent;
        box-shadow: none;
        padding: 0;
        margin-bottom: var(--sp-sm);
    }

    .brand-logo {
        max-width: 180px;
        height: auto;
        margin: 0 auto;
        display: block;
    }

    /* Fix overlap */
    .container {
        gap: var(--sp-lg);
        padding: 0 var(--sp-xs);
    }

    .glass-card {
        padding: var(--sp-lg) var(--sp-sm);
        margin-bottom: var(--sp-sm);
        display: flex;
        flex-direction: column;
    }

    .links-grid {
        gap: var(--sp-sm);
        display: flex;
        flex-direction: column;
        margin-bottom: var(--sp-md);
    }
    
    .glass-btn {
        margin-bottom: var(--sp-xs);
    }
}


/* Request Feedback Alerts */
body.dark-mode #requestSuccessBox {
    background: rgba(37, 211, 102, 0.2) !important;
    color: #4ade80 !important;
    border-color: #22c55e !important;
}
body.dark-mode #requestErrorBox {
    background: rgba(239, 68, 68, 0.2) !important;
    color: #f87171 !important;
    border-color: #ef4444 !important;
}