/* ==========================================================================
   Professional Light Theme SaaS Authentication Suite
   Clean Enterprise Design: Light slate canvas, crisp white cards, 
   deep slate typography (#0f172a), royal blue accents (#2563eb).
   ========================================================================= */

:root {
    --auth-bg: #f8fafc;
    --auth-card-bg: #ffffff;
    --auth-text-main: #0f172a;
    --auth-text-muted: #64748b;
    --auth-text-subtle: #94a3b8;
    --auth-border: #e2e8f0;
    --auth-border-input: #cbd5e1;
    --auth-primary: #2563eb;
    --auth-primary-hover: #1d4ed8;
    --auth-primary-light: #eff6ff;
    --auth-primary-ring: rgba(37, 99, 235, 0.14);
}

.auth-body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: radial-gradient(at 0% 0%, rgba(219, 234, 254, 0.5) 0, transparent 45%),
                radial-gradient(at 100% 100%, rgba(243, 232, 255, 0.4) 0, transparent 45%),
                radial-gradient(at 50% 0%, rgba(224, 231, 255, 0.35) 0, transparent 45%),
                #f8fafc;
    padding: 2rem 1.5rem;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    color: var(--auth-text-main);
    position: relative;
    box-sizing: border-box;
}

/* Subtle background accent shapes */
.auth-bg-decor-1 {
    position: absolute;
    top: 5%;
    left: 5%;
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, rgba(191, 219, 254, 0.45) 0%, transparent 70%);
    filter: blur(50px);
    pointer-events: none;
    z-index: 0;
}

.auth-bg-decor-2 {
    position: absolute;
    bottom: 5%;
    right: 5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(233, 213, 255, 0.4) 0%, transparent 70%);
    filter: blur(60px);
    pointer-events: none;
    z-index: 0;
}

/* Top Navigation Bar with Back to Website */
.auth-top-bar {
    width: 100%;
    max-width: 1120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    position: relative;
    z-index: 10;
}

.auth-back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.55rem 1.15rem;
    border-radius: 50px;
    background: #ffffff;
    border: 1px solid var(--auth-border);
    color: #334155;
    font-size: 0.85rem;
    font-weight: 600;
    text-decoration: none;
    box-shadow: 0 1px 3px rgba(15, 23, 42, 0.04), 0 1px 2px rgba(15, 23, 42, 0.02);
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
}

.auth-back-btn:hover {
    background: #ffffff;
    border-color: #cbd5e1;
    color: var(--auth-primary);
    transform: translateX(-3px);
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.08);
}

.auth-top-nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.auth-nav-link {
    color: var(--auth-text-muted);
    font-size: 0.875rem;
    font-weight: 500;
    text-decoration: none;
    transition: color 0.15s ease;
}

.auth-nav-link:hover {
    color: var(--auth-primary);
}

/* Main Auth Split Card */
.auth-wrapper {
    display: grid;
    grid-template-columns: 1.15fr 1.05fr;
    width: 100%;
    max-width: 1120px;
    min-height: 650px;
    background: #ffffff;
    border: 1px solid var(--auth-border);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 20px 45px -12px rgba(15, 23, 42, 0.08), 
                0 1px 3px rgba(15, 23, 42, 0.04);
    position: relative;
    z-index: 1;
}

/* Left Promo Panel (Rich Corporate Blue) */
.auth-panel-left {
    background: linear-gradient(145deg, #1e3a8a 0%, #172554 100%);
    padding: 3.5rem 3.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.auth-panel-left::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 80% 20%, rgba(59, 130, 246, 0.25) 0%, transparent 60%),
                radial-gradient(circle at 10% 90%, rgba(147, 51, 234, 0.2) 0%, transparent 60%);
    pointer-events: none;
    z-index: 1;
}

.auth-panel-left * {
    position: relative;
    z-index: 2;
}

.auth-brand {
    font-family: 'Outfit', sans-serif;
    font-size: 1.35rem;
    font-weight: 800;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    color: #ffffff;
    text-decoration: none;
    width: fit-content;
}

.auth-brand img {
    width: 34px;
    height: 34px;
    object-fit: contain;
    border-radius: 8px;
    background: #ffffff;
    padding: 2px;
}

.auth-promo-content {
    margin: 2rem 0;
}

.auth-promo-content h1 {
    font-family: 'Outfit', sans-serif;
    font-size: 2.15rem;
    font-weight: 800;
    line-height: 1.25;
    color: #ffffff;
    margin: 0 0 1rem 0;
    letter-spacing: -0.02em;
}

.auth-promo-content p {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(226, 232, 240, 0.9);
    margin: 0 0 1.75rem 0;
}

.auth-promo-features {
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.promo-feature-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: #f8fafc;
    background: rgba(255, 255, 255, 0.08);
    padding: 0.85rem 1.15rem;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(6px);
}

.promo-feature-item i,
.promo-feature-item svg {
    color: #34d399;
    flex-shrink: 0;
}

.auth-trust-badges {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    margin-top: 1.75rem;
    padding-top: 1.75rem;
    border-top: 1px solid rgba(255, 255, 255, 0.15);
    flex-wrap: wrap;
}

.trust-badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(16, 185, 129, 0.2);
    border: 1px solid rgba(16, 185, 129, 0.35);
    color: #6ee7b7;
    padding: 0.35rem 0.85rem;
    border-radius: 50px;
    font-size: 0.78rem;
    font-weight: 700;
}

.auth-panel-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 0.78rem;
    color: rgba(226, 232, 240, 0.65);
}

.auth-panel-footer a {
    color: #93c5fd;
    text-decoration: underline;
}

/* Right Form Panel (Clean Light Surface with anchored footer) */
.auth-panel-right {
    padding: 3.5rem 3.25rem 2.25rem 3.25rem;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    background-color: #ffffff;
    box-sizing: border-box;
    min-height: 100%;
}

.auth-form-container {
    width: 100%;
}

.auth-header {
    margin-bottom: 1.75rem;
}

.auth-header h2 {
    font-family: 'Outfit', sans-serif;
    font-size: 1.85rem;
    font-weight: 800;
    margin: 0 0 0.4rem 0;
    color: #0f172a;
    letter-spacing: -0.02em;
}

.auth-header p {
    color: #64748b;
    font-size: 0.925rem;
    margin: 0;
    line-height: 1.5;
}

/* Form Controls & Inputs */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.45rem;
}

.form-label {
    color: #334155;
    font-weight: 600;
    font-size: 0.875rem;
    display: block;
}

.input-icon-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    width: 100%;
}

.input-icon-wrapper i.input-icon-left,
.input-icon-wrapper svg.input-icon-left,
.input-icon-wrapper > i:first-child,
.input-icon-wrapper > svg:first-child {
    position: absolute;
    left: 1rem;
    color: #64748b;
    pointer-events: none;
    transition: color 0.15s ease;
    z-index: 2;
}

.input-icon-wrapper:focus-within > i:first-child,
.input-icon-wrapper:focus-within > svg:first-child {
    color: var(--auth-primary);
}

.form-control {
    width: 100%;
    height: 48px;
    background: #ffffff;
    border: 1px solid var(--auth-border-input);
    border-radius: 10px;
    padding: 0.65rem 2.85rem 0.65rem 2.85rem;
    color: #0f172a;
    font-size: 0.925rem;
    font-family: inherit;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
    box-sizing: border-box;
}

.input-icon-wrapper:not(:has(.password-toggle-btn)) .form-control {
    padding-right: 1rem;
}

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

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

.form-control:focus {
    background: #ffffff;
    border-color: var(--auth-primary);
    box-shadow: 0 0 0 4px var(--auth-primary-ring);
}

/* Password Eye Toggle Button - Strictly positioned inside input */
.password-toggle-btn {
    position: absolute;
    right: 0.65rem;
    top: 50%;
    transform: translateY(-50%);
    color: #64748b;
    cursor: pointer;
    background: transparent;
    border: none;
    outline: none;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    padding: 0;
    border-radius: 6px;
    transition: all 0.15s ease;
    z-index: 5;
}

.password-toggle-btn:hover {
    color: #0f172a;
    background: #f1f5f9;
}

/* Primary Button */
.btn-primary {
    background: var(--auth-primary);
    border: 1px solid rgba(37, 99, 235, 0.1);
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    font-family: 'Outfit', sans-serif;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.22);
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.55rem;
    color: #ffffff;
    cursor: pointer;
    text-decoration: none;
    width: 100%;
}

.btn-primary:hover {
    background: var(--auth-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.32);
}

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

/* Switch Mode Navigation Text (Need an account / Already have an account) */
.auth-switch-text {
    margin-top: 1.75rem;
    margin-bottom: 0.5rem;
    text-align: center;
    font-size: 0.885rem;
    color: #64748b;
    line-height: 1.5;
    display: block;
}

.auth-switch-text a {
    color: var(--auth-primary);
    font-weight: 700;
    text-decoration: underline;
    margin-left: 0.25rem;
    transition: color 0.15s ease;
}

.auth-switch-text a:hover {
    color: var(--auth-primary-hover);
}

/* Right Panel Bottom Anchored Footer */
.auth-panel-footer-right {
    margin-top: 2.5rem;
    padding-top: 1.25rem;
    border-top: 1px solid #f1f5f9;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    font-size: 0.78rem;
    color: #94a3b8;
}

.auth-panel-footer-right a {
    color: #64748b;
    text-decoration: none;
    transition: color 0.15s ease;
}

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

/* Clean Alert Banners */
.badge-alert {
    padding: 0.85rem 1.15rem;
    border-radius: 10px;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 1.25rem;
    line-height: 1.45;
}

.badge-alert.danger {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: #b91c1c;
}

.badge-alert.success {
    background: #f0fdf4;
    border: 1px solid #bbf7d0;
    color: #15803d;
}

.badge-alert.warning {
    background: #fffbeb;
    border: 1px solid #fde68a;
    color: #b45309;
}

.badge-alert.info {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    color: #1d4ed8;
}

/* OTP Digits Grid */
.otp-container {
    display: flex;
    justify-content: space-between;
    gap: 0.65rem;
    margin: 1.25rem 0;
}

.otp-input {
    width: 52px;
    height: 56px;
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    border: 1.5px solid var(--auth-border-input);
    background-color: #ffffff;
    color: #0f172a;
    border-radius: 10px;
    transition: all 0.2s cubic-bezier(0.16, 1, 0.3, 1);
    outline: none;
}

.otp-input:focus {
    border-color: var(--auth-primary);
    box-shadow: 0 0 0 4px var(--auth-primary-ring);
    transform: scale(1.03);
}

/* Password Strength Meter */
.strength-meter {
    height: 4px;
    width: 100%;
    background-color: #e2e8f0;
    border-radius: 4px;
    margin-top: 0.5rem;
    overflow: hidden;
    display: flex;
    gap: 4px;
}

.strength-bar {
    height: 100%;
    flex: 1;
    background-color: transparent;
    transition: background-color 0.2s ease;
}

.strength-meter.weak .strength-bar:nth-child(1) { background-color: #ef4444; }
.strength-meter.medium .strength-bar:nth-child(1),
.strength-meter.medium .strength-bar:nth-child(2) { background-color: #f59e0b; }
.strength-meter.strong .strength-bar { background-color: #10b981; }

/* ==========================================================================
   Comprehensive Multi-Device Responsiveness (Every Screen Form Factor)
   ========================================================================== */

/* Laptops & Compact Desktops (1025px - 1280px) */
@media (max-width: 1280px) {
    .auth-wrapper {
        max-width: 980px;
        min-height: 600px;
    }
    .auth-panel-left {
        padding: 3rem 2.5rem;
    }
    .auth-promo-content h1 {
        font-size: 1.85rem;
    }
    .auth-panel-right {
        padding: 3rem 2.5rem 2rem 2.5rem;
    }
}

/* Tablets Landscape & Small Laptops (901px - 1024px) */
@media (max-width: 1024px) {
    .auth-wrapper {
        max-width: 900px;
        grid-template-columns: 1fr 1fr;
    }
    .auth-panel-left {
        padding: 2.5rem 2rem;
    }
    .auth-promo-content h1 {
        font-size: 1.65rem;
    }
    .promo-feature-item {
        padding: 0.75rem 0.95rem;
        font-size: 0.85rem;
    }
    .auth-panel-right {
        padding: 2.5rem 2rem 1.75rem 2rem;
    }
}

/* Tablets Portrait & Medium Screens (641px - 900px) */
@media (max-width: 900px) {
    .auth-body {
        padding: 2rem 1.5rem;
    }
    .auth-wrapper {
        grid-template-columns: 1fr;
        max-width: 520px;
        min-height: auto;
        border-radius: 18px;
    }
    .auth-panel-left {
        display: none;
    }
    .auth-panel-right {
        padding: 2.75rem 2.25rem 2rem 2.25rem;
    }
    .auth-top-bar {
        max-width: 520px;
    }
    .auth-top-nav-links {
        gap: 1rem;
    }
}

/* Standard Mobile Devices (481px - 640px) */
@media (max-width: 640px) {
    .auth-body {
        padding: 1.5rem 1rem;
    }
    .auth-wrapper {
        max-width: 100%;
        border-radius: 16px;
    }
    .auth-panel-right {
        padding: 2.25rem 1.75rem 1.75rem 1.75rem;
    }
    .auth-header h2 {
        font-size: 1.65rem;
    }
    .auth-top-nav-links {
        display: none;
    }
}

/* Compact Mobile Devices / iPhones (361px - 480px) */
@media (max-width: 480px) {
    .auth-body {
        padding: 1rem 0.65rem;
    }
    .auth-wrapper {
        border-radius: 14px;
        box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.06);
    }
    .auth-top-bar {
        margin-bottom: 1rem;
    }
    .auth-back-btn {
        padding: 0.45rem 0.95rem;
        font-size: 0.8rem;
    }
    .auth-panel-right {
        padding: 1.85rem 1.25rem 1.5rem 1.25rem;
    }
    .auth-header {
        margin-bottom: 1.35rem;
    }
    .auth-header h2 {
        font-size: 1.5rem;
    }
    .auth-header p {
        font-size: 0.85rem;
    }
    /* iOS input font-size must be at least 16px to prevent unwanted automatic viewport zooming */
    .form-control {
        height: 46px;
        font-size: 1rem;
        padding-left: 2.6rem;
    }
    .input-icon-wrapper i.input-icon-left,
    .input-icon-wrapper svg.input-icon-left,
    .input-icon-wrapper > i:first-child,
    .input-icon-wrapper > svg:first-child {
        left: 0.85rem;
        width: 16px;
        height: 16px;
    }
    .btn-primary {
        height: 46px;
        font-size: 0.925rem;
    }
    .otp-container {
        gap: 6px;
    }
    .otp-input {
        width: 44px;
        height: 48px;
        font-size: 1.25rem;
    }
    .auth-switch-text {
        font-size: 0.825rem;
        margin-top: 1.35rem;
    }
    .auth-panel-footer-right {
        margin-top: 1.75rem;
        padding-top: 1rem;
        flex-wrap: wrap;
        font-size: 0.74rem;
        gap: 0.4rem;
        line-height: 1.4;
    }
}

/* Ultra-Small Mobile Devices (≤ 360px e.g. iPhone SE 1st gen, Galaxy Fold outer screen) */
@media (max-width: 360px) {
    .auth-body {
        padding: 0.75rem 0.5rem;
    }
    .auth-panel-right {
        padding: 1.5rem 1rem 1.25rem 1rem;
    }
    .auth-header h2 {
        font-size: 1.35rem;
    }
    .auth-header p {
        font-size: 0.8rem;
    }
    .form-control {
        height: 44px;
        font-size: 0.95rem;
        padding: 0.5rem 2.25rem 0.5rem 2.4rem;
    }
    .password-toggle-btn {
        right: 0.4rem;
        width: 28px;
        height: 28px;
    }
    .otp-container {
        gap: 4px;
    }
    .otp-input {
        flex: 1;
        min-width: 32px;
        max-width: 40px;
        height: 44px;
        font-size: 1.15rem;
        padding: 0;
    }
    .btn-primary {
        height: 44px;
        font-size: 0.88rem;
    }
    .auth-panel-footer-right {
        font-size: 0.7rem;
    }
}