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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(180deg, #1e3a8a 0%, #1e40af 25%, #1d4ed8 50%, #172554 75%, #020617 100%);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    position: relative;
    overflow: hidden;
}

/* Animated wave background */
body::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(29, 78, 216, 0.4) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(249, 115, 22, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(59, 130, 246, 0.3) 0%, transparent 40%);
    animation: pulseGlow 8s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% {
        opacity: 0.5;
        transform: scale(1);
    }
    50% {
        opacity: 1;
        transform: scale(1.1);
    }
}

/* Floating orbs */
.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(60px);
    opacity: 0.6;
    animation: floatOrb 20s ease-in-out infinite;
    z-index: 0;
    pointer-events: none;
}

.orb-1 {
    width: 300px;
    height: 300px;
    background: #3b82f6;
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 250px;
    height: 250px;
    background: #f97316;
    top: 60%;
    right: 10%;
    animation-delay: -5s;
}

.orb-3 {
    width: 200px;
    height: 200px;
    background: #8b5cf6;
    bottom: 20%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes floatOrb {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(0, -100px) scale(1);
    }
    75% {
        transform: translate(-50px, -50px) scale(0.9);
    }
}

/* Main container - solid white card */
.tab-content {
    background: #ffffff;
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    width: 100%;
    max-width: 420px;
    animation: slideUp 0.5s ease-out;
    position: relative;
    z-index: 10;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Brand logo - blue gradient */
.brand {
    text-align: center;
    margin-bottom: 30px;
}

.brand h1 {
    color: #1d4ed8;
    font-size: 32px;
    font-weight: 800;
    letter-spacing: 1px;
    text-transform: uppercase;
}

/* Navigation pills */
.nav {
    display: flex;
    justify-content: center;
    margin-bottom: 30px;
}

.nav-pills {
    display: flex;
    border-radius: 50px;
    overflow: hidden;
    background: #e7ecff;
    border: 2px solid #1d4ed8;
}

.nav-item {
    flex: 1;
}

.nav-link {
    display: block;
    padding: 14px 35px;
    text-decoration: none;
    color: #1d4ed8;
    text-align: center;
    font-weight: 700;
    font-size: 15px;
    transition: all 0.3s ease;
    border-radius: 25px;
}

.nav-link.active {
    color: #fff;
    background: #1d4ed8;
    box-shadow: 0 4px 15px rgba(29, 78, 216, 0.3);
}

/* Tab content */
.tab-pane {
    display: none;
}

.tab-pane.show.active {
    display: block;
    animation: fadeIn 0.4s ease-out;
}

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

/* Auth message */
#authMessage {
    text-align: center;
    margin-bottom: 20px;
    padding: 12px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
}

.text-center {
    text-align: center;
}

.mb-3,
.mb-4 {
    margin-bottom: 1.2rem;
}

/* Social buttons */
.btn-floating {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    margin: 0 8px;
    text-decoration: none;
    background: #f1f5f9;
    border: 2px solid #e2e8f0;
    color: #1e293b;
    font-size: 18px;
    transition: all 0.3s ease;
    cursor: pointer;
}

.btn-floating:hover {
    background: #1d4ed8;
    border-color: #1d4ed8;
    color: #fff;
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(29, 78, 216, 0.3);
}

.btn-link {
    background: transparent;
    color: #333;
}

/* Text styling - dark for visibility */
p, .text-center p {
    color: #1e293b;
    margin-bottom: 15px;
    font-weight: 500;
}

/* Form inputs */
.form-outline {
    position: relative;
    margin-bottom: 1.8rem;
}

.form-control {
    width: 100%;
    padding: 16px 15px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 15px;
    background: #fff;
    color: #1e293b;
    transition: all 0.3s ease;
    outline: none;
}

.form-control:focus {
    border-color: #1d4ed8;
    box-shadow: 0 0 0 4px rgba(29, 78, 216, 0.1);
}

.form-label {
    position: absolute;
    top: 50%;
    left: 15px;
    transform: translateY(-50%);
    color: #64748b;
    transition: all 0.3s ease;
    pointer-events: none;
    font-size: 15px;
    font-weight: 500;
}

.form-control:focus + .form-label,
.form-control:not(:placeholder-shown) + .form-label {
    top: -10px;
    left: 10px;
    font-size: 12px;
    color: #1d4ed8;
    background: #fff;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

/* Password error */
#passwordError {
    text-align: center;
    margin-bottom: 15px;
    color: #dc2626;
    font-size: 14px;
    font-weight: 600;
}

/* Checkbox */
.form-check {
    display: flex;
    align-items: center;
    color: #1e293b;
    font-size: 14px;
    font-weight: 500;
}

.form-check-input {
    margin-right: 8px;
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: #1d4ed8;
}

.form-check-label {
    cursor: pointer;
}

/* Links - blue theme */
a {
    color: #1d4ed8;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
}

a:hover {
    color: #f97316;
}

/* Primary button - blue */
.btn {
    padding: 16px 25px;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    transition: all 0.3s ease;
}

.btn-primary {
    background: #1d4ed8;
    color: #fff;
    box-shadow: 0 4px 15px rgba(29, 78, 216, 0.4);
}

.btn-primary:hover {
    background: #1e40af;
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(29, 78, 216, 0.5);
}

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

.btn-block {
    width: 100%;
}

/* Layout */
.row {
    display: flex;
    flex-wrap: wrap;
}

.col-md-6 {
    flex: 0 0 50%;
    max-width: 50%;
}

.d-flex {
    display: flex;
}

.justify-content-center {
    justify-content: center;
}

/* Responsive */
@media (max-width: 480px) {
    .tab-content {
        margin: 20px;
        padding: 30px 20px;
    }
    
    .brand h1 {
        font-size: 28px;
    }
    
    .nav-link {
        padding: 12px 25px;
        font-size: 14px;
    }
    
    .btn-floating {
        width: 42px;
        height: 42px;
        margin: 0 5px;
    }
    
    .col-md-6 {
        flex: 0 0 100%;
        max-width: 100%;
        margin-bottom: 10px;
    }
}

/* Loading state */
.btn.loading {
    pointer-events: none;
    opacity: 0.8;
}