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

:root {
    --bg-main: #F5F7FA;
    --primary-indigo: #2D55DA;
    --primary-indigo-hover: #2243B6;
    --secondary-teal: #149E8A;
    --secondary-teal-hover: #0E7F6F;
    --card-bg: #FFFFFF;
    --card-shadow: 0 4px 20px rgba(45, 85, 218, 0.08), 0 1px 3px rgba(0, 0, 0, 0.05);
    --text-heading: #1E293B;
    --text-body: #475569;
    --text-muted: #64748B;
    --input-bg: #F8FAFC;
    --input-border: #E2E8F0;
    --input-focus-border: #2D55DA;
    --tab-inactive-bg: #EDF2F7;
    --tab-inactive-text: #64748B;
    --danger: #EF4444;
    --success: #10B981;
    --radius-card: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
}

body {
    min-height: 100vh;
    background-color: var(--bg-main);
    /* Subtle technology grid overlay */
    background-image:
        linear-gradient(to right, rgba(45, 85, 218, 0.04) 1px, transparent 1px),
        linear-gradient(to bottom, rgba(45, 85, 218, 0.04) 1px, transparent 1px),
        radial-gradient(circle at 10% 20%, rgba(45, 85, 218, 0.03) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(20, 158, 138, 0.03) 0%, transparent 40%);
    background-size: 32px 32px, 32px 32px, 100% 100%, 100% 100%;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 24px;
    color: var(--text-body);
}

.auth-container {
    width: 100%;
    max-width: 440px;
    background: var(--card-bg);
    border-radius: var(--radius-card);
    box-shadow: var(--card-shadow);
    border: 1px solid rgba(226, 232, 240, 0.8);
    padding: 40px 36px;
    position: relative;
    overflow: hidden;
}

.auth-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-indigo), var(--secondary-teal));
}

.brand-header {
    text-align: center;
    margin-bottom: 28px;
}

.brand-logo-img {
    width: 80px;
    height: 80px;
    object-fit: contain;
    margin-bottom: 16px;
    filter: drop-shadow(0 4px 12px rgba(45, 85, 218, 0.18));
}

.brand-header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-heading);
    letter-spacing: -0.01em;
}

.brand-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-top: 4px;
}

/* Tabs Navigation */
.auth-tabs {
    display: flex;
    background: var(--tab-inactive-bg);
    padding: 4px;
    border-radius: 12px;
    margin-bottom: 24px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    padding: 10px 16px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tab-inactive-text);
    cursor: pointer;
    border-radius: 8px;
    transition: all 0.25s ease;
}

.tab-btn.active {
    background: var(--primary-indigo);
    color: #FFFFFF;
    box-shadow: 0 2px 8px rgba(45, 85, 218, 0.25);
}

/* Form Layout Improvements */
.form-wrapper {
    position: relative;
}

.auth-form {
    display: none;
    flex-direction: column;
    gap: 16px;
    animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.auth-form.active {
    display: flex;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(6px);
    }

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

/* Tight Label + Input Grouping */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 4px;
    /* Reduced gap between label and input */
}

.input-group label {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-heading);
}

.input-field-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.input-field-wrapper svg {
    position: absolute;
    left: 14px;
    width: 18px;
    height: 18px;
    stroke: var(--text-muted);
    fill: none;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
    transition: stroke 0.2s ease;
}

.input-field-wrapper input {
    width: 100%;
    padding: 12px 14px 12px 42px;
    /* Increased vertical padding */
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: var(--radius-md);
    color: var(--text-heading);
    font-size: 0.9375rem;
    outline: none;
    transition: all 0.2s ease;
}

.input-field-wrapper input::placeholder {
    color: #94A3B8;
}

.input-field-wrapper input:focus {
    background: #FFFFFF;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(45, 85, 218, 0.12);
}

.input-field-wrapper input:focus+svg {
    stroke: var(--primary-indigo);
}

/* Inline Field Status Feedback */
.field-feedback {
    font-size: 0.75rem;
    font-weight: 500;
    margin-top: 2px;
    display: none;
    align-items: center;
    gap: 4px;
}

.field-feedback.show {
    display: flex;
}

.field-feedback.available {
    color: #10B981;
}

.field-feedback.taken {
    color: #EF4444;
}

.btn-submit {
    margin-top: 8px;
    width: 100%;
    padding: 13px 16px;
    background: var(--primary-indigo);
    border: none;
    border-radius: var(--radius-md);
    color: #FFFFFF;
    font-size: 0.9375rem;
    font-weight: 600;
    font-family: 'Poppins', sans-serif;
    cursor: pointer;
    transition: all 0.25s ease;
    box-shadow: 0 4px 12px rgba(45, 85, 218, 0.25);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-submit:hover {
    background: var(--primary-indigo-hover);
    box-shadow: 0 6px 16px rgba(45, 85, 218, 0.35);
    transform: translateY(-1px);
}

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

/* Alert Notification */
.alert-box {
    padding: 12px 14px;
    border-radius: var(--radius-md);
    font-size: 0.84rem;
    margin-bottom: 18px;
    display: none;
    align-items: center;
    gap: 10px;
    line-height: 1.4;
    font-weight: 500;
}

.alert-box.show {
    display: flex;
    animation: fadeIn 0.3s ease;
}

.alert-box.error {
    background: #FEF2F2;
    border: 1px solid #FCA5A5;
    color: #991B1B;
}

.alert-box.success {
    background: #ECFDF5;
    border: 1px solid #6EE7B7;
    color: #065F46;
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: #FFFFFF;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

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

.auth-footer {
    margin-top: 24px;
    text-align: center;
    font-size: 0.875rem;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--primary-indigo);
    font-weight: 600;
    text-decoration: none;
    transition: color 0.2s ease;
}

.auth-footer a:hover {
    color: var(--primary-indigo-hover);
    text-decoration: underline;
}

.logged-in-box {
    text-align: center;
    padding: 10px 0;
}

.logged-in-box h2 {
    font-size: 1.25rem;
    color: var(--text-heading);
    margin-bottom: 6px;
}

.logged-in-box p {
    color: var(--text-muted);
    margin-bottom: 20px;
    font-size: 0.9rem;
}