@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --bg-dark: #f0f4f8;
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(255, 255, 255, 0.6);
    --text-main: #1e293b;
    --text-muted: #64748b;
    --input-bg: rgba(255, 255, 255, 0.9);
}

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

body {
    font-family: 'Outfit', sans-serif;
    background: var(--bg-dark);
    background-image: 
        radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.15) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(37, 99, 235, 0.1) 0px, transparent 50%);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem 1rem;
    line-height: 1.5;
}

.auth-container {
    width: 100%;
    max-width: 480px;
    perspective: 1000px;
}

.auth-card {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem 2.5rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: slideUp 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.auth-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.logo-link {
    display: inline-block;
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.logo-link:hover {
    transform: scale(1.05);
}

.logo-img {
    height: 42px;
    filter: none;
}

/* Mode Switcher Tabs */
.mode-switcher {
    background: rgba(241, 245, 249, 0.8);
    padding: 4px;
    border-radius: 12px;
    display: flex;
    gap: 4px;
    margin-bottom: 2rem;
    border: 1px solid var(--glass-border);
}

.mode-tab {
    flex: 1;
    padding: 10px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: inherit;
}

.mode-tab.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.25);
}

.auth-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #1e293b, #64748b);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.auth-subtitle {
    color: var(--text-muted);
    font-size: 0.95rem;
    min-height: 1.4em;
}

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    margin-left: 0.25rem;
}

.input-wrapper {
    position: relative;
}

.input-icon {
    position: absolute;
    left: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 1.1rem;
    transition: color 0.3s ease;
    pointer-events: none;
    z-index: 5;
}

.form-control {
    width: 100%;
    padding: 1rem 1.25rem 1rem 3.5rem;
    background: var(--input-bg);
    border: 1px solid var(--glass-border);
    border-radius: 14px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.form-control.no-icon {
    padding-left: 1.25rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    background: #ffffff;
    box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.15);
}

.form-control:focus + .input-icon, 
.form-control:focus ~ .input-icon {
    color: var(--primary);
}

.form-control::placeholder {
    color: #94a3b8;
}

input[type="date"]::-webkit-calendar-picker-indicator {
    filter: none;
    cursor: pointer;
}

/* Password Toggle */
.password-toggle {
    position: absolute;
    right: 1.25rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.1rem;
    transition: color 0.3s ease;
    z-index: 10;
}

.password-toggle:hover {
    color: var(--text-main);
}

.btn-submit {
    width: 100%;
    padding: 1rem;
    background: var(--primary);
    border: none;
    border-radius: 14px;
    color: white;
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    position: relative;
    overflow: hidden;
}

.btn-submit:hover:not(:disabled) {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px rgba(59, 130, 246, 0.4);
}

.btn-submit:active:not(:disabled) {
    transform: translateY(0);
}

.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

/* Loader Animation */
.spinner {
    display: none;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

.btn-submit.loading .spinner {
    display: inline-block;
}

.btn-submit.loading span, 
.btn-submit.loading i:not(.spinner) {
    display: none;
}

.auth-footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.auth-link {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
}

.auth-link:hover {
    color: #60a5fa;
    text-decoration: underline;
}

.alert-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 14px;
    padding: 1rem 1.25rem;
    margin-bottom: 1.5rem;
    color: #fca5a5;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-error ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.alert-error li {
    display: flex;
    align-items: center;
    gap: 8px;
}

.alert-error li::before {
    content: "\f06a";
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
}

/* Birthday Dropdown Flex */
.birthday-flex {
    display: flex;
    gap: 10px;
}

.birthday-col-1 { flex: 1; position: relative; }
.birthday-col-2 { flex: 1.5; position: relative; }
.birthday-col-3 { flex: 1.2; position: relative; }

@media (max-width: 480px) {
    .auth-card {
        padding: 2.5rem 1.5rem;
        background: transparent;
        border: none;
        box-shadow: none;
        backdrop-filter: none;
    }
    
    body {
        background-image: 
            radial-gradient(at 0% 0%, rgba(59, 130, 246, 0.1) 0px, transparent 50%);
    }
}