:root {
    --brand-green: #00a651;
    --brand-red: #e63946;
    --brand-white: #ffffff;
    --brand-light-bg: #f8f9fa;
    --brand-surface: #ffffff;
    --brand-border: rgba(0, 0, 0, 0.1);
    --brand-text: #1a1a1a;
    --brand-text-muted: #6c757d;
    --radius-lg: 24px;
    --radius-md: 16px;
    --glass: rgba(0, 166, 81, 0.05);
    --glow: 0 4px 20px rgba(0, 166, 81, 0.15);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    color: var(--brand-text);
    font-family: 'Outfit', sans-serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* --- Splash Screen --- */
.splash-screen {
    position: fixed;
    inset: 0;
    background: linear-gradient(135deg, #ffffff 0%, #f0f4f8 100%);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: opacity 1s cubic-bezier(0.4, 0, 0.2, 1), visibility 1s;
    overflow: hidden;
}

.splash-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

/* Animated Background Circles */
.splash-bg-circles {
    position: absolute;
    inset: 0;
    overflow: hidden;
    z-index: 1;
}

.circle {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0, 166, 81, 0.1) 0%, transparent 70%);
    animation: floatCircle 20s infinite ease-in-out;
}

.circle-1 {
    width: 400px;
    height: 400px;
    top: -200px;
    right: -100px;
    animation-delay: 0s;
}

.circle-2 {
    width: 300px;
    height: 300px;
    bottom: -150px;
    left: -100px;
    animation-delay: 7s;
}

.circle-3 {
    width: 250px;
    height: 250px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 14s;
}

/* Logo Section */
.brand-logo-large {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out;
}

.logo-icon-wrapper {
    position: relative;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    animation: scaleIn 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.shield-icon {
    width: 56px;
    height: 56px;
    color: var(--brand-green);
    position: relative;
    z-index: 3;
    animation: iconPulse 2s infinite ease-in-out;
    filter: drop-shadow(0 4px 12px rgba(0, 166, 81, 0.3));
}

.logo-ring {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 3px solid var(--brand-green);
    border-radius: 50%;
    opacity: 0.3;
    animation: ringExpand 2s infinite ease-out;
}

.logo-ring-2 {
    position: absolute;
    width: 80px;
    height: 80px;
    border: 3px solid var(--brand-green);
    border-radius: 50%;
    opacity: 0.2;
    animation: ringExpand 2s infinite ease-out 1s;
}

.brand-title {
    font-size: 3.5rem;
    font-weight: 900;
    letter-spacing: 0.2em;
    color: var(--brand-green);
    margin: 0;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    text-shadow: 0 2px 20px rgba(0, 166, 81, 0.2);
}

.brand-tagline {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--brand-text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin: 0;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* Loading Section */
.loading-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.loading-track {
    width: 240px;
    height: 4px;
    background: rgba(0, 166, 81, 0.1);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.loading-fill {
    height: 100%;
    background: linear-gradient(90deg, 
        var(--brand-green) 0%, 
        #00d66a 50%, 
        var(--brand-green) 100%);
    border-radius: 10px;
    animation: loadingProgress 2s ease-in-out infinite;
    box-shadow: 0 0 10px rgba(0, 166, 81, 0.5);
}

.loading-text {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.75rem;
    color: var(--brand-text-muted);
    letter-spacing: 0.05em;
    font-weight: 500;
}

.loading-dots {
    display: flex;
    gap: 0.25rem;
}

.loading-dots .dot {
    width: 4px;
    height: 4px;
    background: var(--brand-green);
    border-radius: 50%;
    animation: dotBounce 1.4s infinite ease-in-out;
}

.loading-dots .dot:nth-child(1) {
    animation-delay: 0s;
}

.loading-dots .dot:nth-child(2) {
    animation-delay: 0.2s;
}

.loading-dots .dot:nth-child(3) {
    animation-delay: 0.4s;
}

/* Security Badge */
.splash-security {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.6rem 1.2rem;
    background: rgba(0, 166, 81, 0.08);
    border: 1px solid rgba(0, 166, 81, 0.2);
    border-radius: 100px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--brand-green);
    letter-spacing: 0.05em;
    animation: fadeInUp 0.8s ease-out 0.8s both;
    box-shadow: 0 2px 8px rgba(0, 166, 81, 0.1);
}

.splash-security i {
    width: 14px;
    height: 14px;
}

/* --- Main Portal --- */
.main-portal {
    width: 100%;
    max-width: 440px;
    padding: 1.5rem;
    opacity: 1;
    transform: translateY(0);
    transition: all 0.8s ease;
}

.main-portal.hidden {
    display: none;
    opacity: 0;
    transform: translateY(20px);
}

.portal-card {
    background: var(--brand-surface);
    border: 1px solid var(--brand-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.card-header {
    padding: 2.5rem 2.5rem 1.5rem;
    background: linear-gradient(135deg, rgba(0, 166, 81, 0.05) 0%, rgba(255, 255, 255, 0.8) 100%);
    border-bottom: 1px solid var(--brand-border);
}

.header-top {
    display: flex;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.gateway-status {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.65rem;
    font-weight: 800;
    letter-spacing: 0.05em;
    color: var(--brand-text-muted);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    background: var(--brand-green);
    border-radius: 50%;
    animation: dotPulse 1.5s infinite;
}

.brand-badge {
    background: var(--brand-green);
    color: white;
    padding: 0.4rem 0.8rem;
    border-radius: 100px;
    font-size: 0.65rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.4rem;
    box-shadow: var(--shadow-sm);
}

.header-main h2 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.01em;
    margin-bottom: 0.5rem;
}

.header-main p {
    color: var(--brand-text-muted);
    font-size: 0.9rem;
    line-height: 1.4;
}

.payment-form {
    padding: 0 2.5rem 2.5rem;
}

.form-section {
    margin-bottom: 2rem;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--brand-text-muted);
    letter-spacing: 0.05em;
    margin-bottom: 1.25rem;
}

.section-title i {
    width: 16px;
    color: var(--brand-green);
}

.amount-presets {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.preset-btn {
    background: white;
    border: 2px solid var(--brand-border);
    border-radius: var(--radius-md);
    padding: 1rem 0;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    box-shadow: var(--shadow-sm);
}

.preset-btn:hover {
    border-color: var(--brand-green);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.preset-btn.active {
    background: var(--brand-green);
    border-color: var(--brand-green);
    box-shadow: var(--glow);
}

.preset-currency {
    font-size: 0.65rem;
    font-weight: 700;
    color: var(--brand-text-muted);
}

.preset-btn.active .preset-currency {
    color: white;
}

.preset-val {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--brand-text);
}

.preset-btn.active .preset-val {
    color: white;
}

.custom-input-box {
    background: white;
    border: 2px solid var(--brand-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.custom-input-box:focus-within {
    border-color: var(--brand-green);
    background: white;
    box-shadow: var(--glow);
}

.currency-label {
    font-weight: 800;
    font-size: 0.8rem;
    color: var(--brand-green);
    margin-right: 0.75rem;
}

#customAmount {
    width: 100%;
    background: transparent;
    border: none;
    color: var(--brand-text);
    padding: 1rem 0;
    font-size: 1rem;
    font-weight: 700;
    outline: none;
}

.amount-hint {
    font-size: 0.7rem;
    color: var(--brand-text-muted);
    margin-top: 0.5rem;
    padding-left: 0.5rem;
}

.phone-input-container {
    background: white;
    border: 2px solid var(--brand-border);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    padding: 0 1rem;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.phone-input-container:focus-within {
    border-color: var(--brand-green);
    box-shadow: var(--glow);
}

.phone-prefix {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding-right: 1rem;
    border-right: 1px solid var(--brand-border);
    font-weight: 800;
    color: var(--brand-green);
}

.flag-icon {
    width: 18px;
    border-radius: 2px;
}

#phoneNumber {
    width: 100%;
    background: transparent;
    border: none;
    padding: 1rem;
    color: var(--brand-text);
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: 0.1em;
    outline: none;
}

.input-hint {
    font-size: 0.7rem;
    color: var(--brand-text-muted);
    margin-top: 0.5rem;
    text-align: center;
}

.cta-button {
    width: 100%;
    background: var(--brand-green);
    border: none;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    color: white;
    cursor: pointer;
    font-weight: 900;
    letter-spacing: 0.05em;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    box-shadow: var(--shadow-md);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--glow);
    background: #00b85a;
}

.cta-button:active {
    transform: translateY(0);
}

.cta-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.cta-loader {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-green);
}

.cta-loader::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.card-footer {
    padding: 1.5rem 2.5rem;
    background: var(--brand-light-bg);
    border-top: 1px solid var(--brand-border);
    text-align: center;
}

.footer-security {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    color: var(--brand-text-muted);
    font-size: 0.7rem;
    margin-bottom: 0.75rem;
}

.footer-security i {
    width: 14px;
    color: var(--brand-green);
}

.footer-links {
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--brand-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.divider {
    margin: 0 0.5rem;
    opacity: 0.3;
}

.status-alert {
    padding: 1rem;
    border-radius: var(--radius-md);
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    text-align: center;
    animation: slideUp 0.3s ease-out;
    box-shadow: var(--shadow-sm);
}

.status-alert.success {
    background: rgba(0, 166, 81, 0.1);
    color: var(--brand-green);
    border: 2px solid var(--brand-green);
}

.status-alert.error {
    background: rgba(230, 57, 70, 0.1);
    color: var(--brand-red);
    border: 2px solid var(--brand-red);
}

.hidden {
    display: none !important;
}

/* --- Animations --- */
@keyframes floatCircle {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.3;
    }
    25% {
        transform: translate(30px, -30px) scale(1.1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-20px, 20px) scale(0.9);
        opacity: 0.4;
    }
    75% {
        transform: translate(20px, 30px) scale(1.05);
        opacity: 0.6;
    }
}

@keyframes scaleIn {
    0% {
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes iconPulse {
    0%, 100% {
        transform: scale(1);
        filter: drop-shadow(0 4px 12px rgba(0, 166, 81, 0.3));
    }
    50% {
        transform: scale(1.1);
        filter: drop-shadow(0 6px 20px rgba(0, 166, 81, 0.5));
    }
}

@keyframes ringExpand {
    0% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        opacity: 0.1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

@keyframes fadeInUp {
    0% {
        opacity: 0;
        transform: translateY(30px);
    }
    100% {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes loadingProgress {
    0% {
        transform: translateX(-100%);
    }
    50% {
        transform: translateX(0%);
    }
    100% {
        transform: translateX(100%);
    }
}

@keyframes dotBounce {
    0%, 80%, 100% {
        transform: scale(0);
        opacity: 0.5;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

@keyframes flow {
    0% { left: -50%; }
    100% { left: 100%; }
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.8; transform: scale(1); filter: drop-shadow(0 0 5px var(--brand-green)); }
    50% { opacity: 1; transform: scale(1.05); filter: drop-shadow(0 0 15px var(--brand-green)); }
}

@keyframes dotPulse {
    0% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.4; transform: scale(1.5); }
    100% { opacity: 1; transform: scale(1); }
}

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

@keyframes slideUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Mobile adjustments */
@media (max-width: 480px) {
    .portal-card { border-radius: 0; min-height: 100vh; }
    .main-portal { padding: 0; max-width: 100%; }
    .card-header { padding: 4rem 2rem 2rem; }
    .payment-form { padding: 0 2rem 2rem; }
}