styles.css

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top center, rgba(48, 54, 93, 0.95), transparent 25%),
        radial-gradient(circle at bottom left, rgba(29, 78, 216, 0.24), transparent 20%),
        linear-gradient(180deg, #050816 0%, #091025 100%);
    color: #f8fbff;
    padding: 24px;
    perspective: 1200px;
}

body::before,
body::after {
    content: '';
    position: absolute;
    pointer-events: none;
    z-index: 0;
    filter: blur(100px);
    opacity: 0.7;
}

body::before {
    width: 360px;
    height: 360px;
    top: 8%;
    left: 12%;
    background: rgba(59, 130, 246, 0.22);
}

body::after {
    width: 480px;
    height: 480px;
    bottom: -6%;
    right: -5%;
    background: rgba(14, 165, 233, 0.18);
}

@keyframes aurora {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.container {
    position: relative;
    width: 100%;
    max-width: 460px;
    background: rgba(8, 14, 32, 0.88);
    background-clip: padding-box;
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 32px;
    box-shadow:
        inset 0 0 0 0.5px rgba(255, 255, 255, 0.05),
        0 28px 90px rgba(2, 8, 24, 0.55);
    overflow: hidden;
    transform-style: preserve-3d;
    transition: transform 0.28s ease-out, box-shadow 0.28s ease-out, background 0.18s ease;
    will-change: transform, box-shadow;
}

.container::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    background: radial-gradient(circle at top left, rgba(255, 255, 255, 0.35), transparent 30%),
        radial-gradient(circle at bottom right, rgba(79, 70, 229, 0.18), transparent 30%);
}

.container::after {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
    border-radius: inherit;
    box-shadow: inset 0 0 180px rgba(255, 255, 255, 0.12);
}

.container:hover {
    transform: translateY(-6px) rotateZ(0.2deg);
    box-shadow:
        inset 0 0 0 0.5px rgba(255, 255, 255, 0.85),
        0 26px 72px rgba(25, 7, 83, 0.22),
        0 12px 36px rgba(15, 23, 42, 0.22);
}

.header {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    color: #f8fbff;
    padding: 32px 32px 24px;
    position: relative;
    overflow: hidden;
}

.header h1 {
    font-size: 2.6rem;
    letter-spacing: -0.04em;
    margin-bottom: 14px;
}

.header .subtitle {
    max-width: 420px;
    color: rgba(255, 255, 255, 0.72);
    line-height: 1.7;
    font-size: 0.97rem;
}

.header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 200px;
    height: 200px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 50%;
    transform: translateZ(0);
}

.header::after {
    content: '';
    position: absolute;
    bottom: -60%;
    left: -10%;
    width: 160px;
    height: 160px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
}

.logo {
    display: flex;
    align-items: center;
    gap: 14px;
    position: relative;
    z-index: 1;
}

.lock-icon {
    display: inline-block;
    animation: lock-spin 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.3s both;
    transform-origin: center;
    font-size: 1.8rem;
}

@keyframes lock-spin {
    0% {
        transform: rotateY(-90deg) scale(0.5);
        opacity: 0;
    }

    100% {
        transform: rotateY(0deg) scale(1);
        opacity: 1;
    }
}

.logo h1 {
    font-size: 1.6rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
    letter-spacing: 0.5px;
}

.main-content {
    padding: 28px 32px 32px;
}

.form-container {
    display: none;
}

.form-container.active {
    display: block;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: rgba(255, 255, 255, 0.76);
    font-size: 0.92rem;
    font-weight: 600;
}

.form-group input {
    width: 100%;
    padding: 16px 18px;
    background: rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 18px;
    font-size: 1rem;
    color: #f8fbff;
    outline: none;
    transition: border-color 0.25s ease, box-shadow 0.25s ease, transform 0.2s ease, background 0.25s ease;
    transform: translateZ(0);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.04), 0 18px 40px rgba(0, 0, 0, 0.08);
}

.form-group input::placeholder {
    color: rgba(255, 255, 255, 0.52);
}

.form-group input:hover,
.form-group input:focus {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(59, 130, 246, 0.8);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.16), 0 12px 26px rgba(15, 23, 42, 0.18);
    transform: translateY(-1px);
}

.password-input {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 10px;
}

.toggle-password {
    border: 1px solid rgba(255, 255, 255, 0.75);
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.65);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    color: #4f46e5;
    cursor: pointer;
    padding: 0 14px;
    min-width: 60px;
    transition: background 0.2s ease;
}

.toggle-password:hover {
    background: rgba(255, 255, 255, 0.88);
}

.btn {
    width: 100%;
    padding: 14px 16px;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    cursor: pointer;
    transition: transform 0.15s ease, box-shadow 0.15s ease;
    position: relative;
    overflow: hidden;
}

.btn-primary {
    background: linear-gradient(135deg, #4f5ce4 0%, #2563eb 100%);
    color: white;
    box-shadow: 0 12px 30px rgba(11, 40, 92, 0.28);
    transition: transform 0.22s ease, box-shadow 0.22s ease, background 0.35s ease;
}

.social-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin: 20px 0 0;
}

.social-btn {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: rgba(255, 255, 255, 0.88);
    font-weight: 600;
    padding: 12px 0;
    border-radius: 14px;
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.02), 0 14px 25px rgba(0, 0, 0, 0.12);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.social-btn .social-icon {
    width: 20px;
    height: 20px;
}

.social-btn .sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.social-btn:hover {
    transform: translateY(-1px);
}

.social-btn.facebook {
    color: #93c5fd;
}

.social-btn.facebook:hover {
    background: #1877F2;
    color: #ffffff;
}

.social-btn.google {
    color: #f8fafc;
}

.social-btn.google:hover {
    background: #EA4335;
    color: #ffffff;
}

.social-btn.apple {
    color: #f8fafc;
}

.social-btn.apple:hover {
    background: #ffffff;
    color: #000000;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 16px 36px rgba(11, 40, 92, 0.32);
    background: linear-gradient(135deg, #3b54e0 0%, #1d4ed8 100%);
}

.btn-primary:active {
    transform: translateY(3px);
    box-shadow: 0 1px 0 #3730a3, 0 2px 8px rgba(79, 70, 229, 0.2);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.08);
    color: #f8fbff;
    margin-top: 12px;
    border: 1px solid rgba(255, 255, 255, 0.12);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.12);
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 0 #c7cad1, 0 8px 16px rgba(0, 0, 0, 0.1);
}

.btn-secondary:active {
    transform: translateY(2px);
    box-shadow: 0 1px 0 #c7cad1, 0 2px 6px rgba(0, 0, 0, 0.06);
}

.form-footer {
    margin-top: 16px;
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.72);
}

.form-footer a {
    color: #60a5fa;
    text-decoration: none;
    font-weight: 600;
}

.alert {
    margin-top: 12px;
    padding: 14px 16px;
    border-radius: 12px;
    display: none;
    font-size: 0.95rem;
}

.alert-success {
    background: rgba(34, 197, 94, 0.20);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(34, 197, 94, 0.40);
    color: #14532d;
}

.alert-error {
    background: rgba(239, 68, 68, 0.20);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(239, 68, 68, 0.40);
    color: #7f1d1d;
}

.alert-info {
    background: rgba(59, 130, 246, 0.16);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid rgba(59, 130, 246, 0.32);
    color: #1d4ed8;
}

.link-box {
    margin: 14px 0 18px;
    padding: 16px;
    border-radius: 16px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px dashed rgba(96, 165, 250, 0.25);
    color: #edf2ff;
    word-break: break-word;
}

.link-box a {
    color: #4f46e5;
    text-decoration: none;
    font-weight: 600;
}

.footer {
    background: rgba(255, 255, 255, 0.04);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 18px 32px;
    color: rgba(255, 255, 255, 0.54);
    text-align: center;
    font-size: 0.88rem;
}

.question-block {
    border: 1px solid rgba(255, 255, 255, 0.55);
    border-radius: 14px;
    padding: 16px;
    margin-bottom: 16px;
    background: rgba(255, 255, 255, 0.30);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
}

.question-block label {
    margin-bottom: 6px;
}

@media (max-width: 600px) {
    .container {
        max-width: 100%;
        border-radius: 24px;
    }

    .main-content {
        padding: 24px 20px 28px;
    }

    .header h1 {
        font-size: 2.2rem;
    }
}

@keyframes flipOut {
    from {
        transform: perspective(800px) rotateY(0deg);
        opacity: 1;
    }

    to {
        transform: perspective(800px) rotateY(90deg);
        opacity: 0;
    }
}

@keyframes flipIn {
    from {
        transform: perspective(800px) rotateY(-90deg);
        opacity: 0;
    }

    to {
        transform: perspective(800px) rotateY(0deg);
        opacity: 1;
    }
}

.form-container.flip-out {
    display: block;
    animation: flipOut 0.28s ease forwards;
}

.form-container.flip-in {
    animation: flipIn 0.28s ease forwards;
}

.ripple {
    position: absolute;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.38);
    transform: scale(0);
    animation: ripple-expand 0.55s linear;
    pointer-events: none;
}

@keyframes ripple-expand {
    to {
        transform: scale(4);
        opacity: 0;
    }
}

.password-strength {
    margin-top: 8px;
    height: 5px;
    border-radius: 3px;
    background: #e5e7eb;
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    border-radius: 3px;
    width: 0%;
    transition: width 0.4s ease, background-color 0.4s ease;
}

.strength-label {
    display: block;
    font-size: 0.78rem;
    margin-top: 5px;
    font-weight: 600;
    transition: color 0.3s ease;
}

@keyframes shake {

    0%,
    100% {
        transform: translateX(0);
    }

    15% {
        transform: translateX(-8px);
    }

    30% {
        transform: translateX(8px);
    }

    45% {
        transform: translateX(-5px);
    }

    60% {
        transform: translateX(5px);
    }

    75% {
        transform: translateX(-2px);
    }

    90% {
        transform: translateX(2px);
    }
}

.shake {
    animation: shake 0.52s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

.password-checklist {
    list-style: none;
    margin-top: 10px;
    display: flex;
    flex-direction: column;
    gap: 5px;
}

.check-item {
    font-size: 0.80rem;
    color: rgba(239, 68, 68, 0.85);
    display: flex;
    align-items: center;
    gap: 7px;
    transition: color 0.3s ease;
}

.check-item.valid {
    color: #16a34a;
}

.check-icon {
    font-weight: 700;
    width: 14px;
    text-align: center;
}

/* ========== THEME TOGGLE ========== */
.theme-toggle {
    position: absolute;
    top: 16px;
    right: 16px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 1.1rem;
    transition: background 0.2s ease, transform 0.2s ease;
    z-index: 2;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.22);
    transform: scale(1.1);
}

/* ========== REMEMBER ME ========== */
.remember-group {
    margin-bottom: 14px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.72);
    font-size: 0.92rem;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: 17px;
    height: 17px;
    accent-color: #4f5ce4;
    cursor: pointer;
    flex-shrink: 0;
}

/* ========== ATTEMPT COUNTER ========== */
.attempt-counter {
    margin-top: 10px;
    font-size: 0.85rem;
    color: #f97316;
    text-align: center;
    min-height: 1.2em;
}

.attempt-counter.blocked {
    color: #ef4444;
    font-weight: 600;
}

/* ========== LOADING BUTTON ========== */
.btn--loading {
    pointer-events: none;
    opacity: 0.75;
}

.btn--loading::after {
    content: '';
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-top-color: #fff;
    border-radius: 50%;
    animation: btn-spin 0.65s linear infinite;
    vertical-align: middle;
}

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

/* ========== DASHBOARD ========== */
.dashboard {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    padding: 8px 0 4px;
    text-align: center;
}

.dashboard-avatar {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f5ce4, #2563eb);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
    box-shadow: 0 8px 24px rgba(79, 92, 228, 0.4);
    margin-bottom: 4px;
}

.dashboard-name {
    font-size: 1.4rem;
    font-weight: 700;
    color: #f8fbff;
    margin: 0;
}

.dashboard-email {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.55);
    margin: 0;
}

.dashboard-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    width: 100%;
    margin: 14px 0 4px;
}

.stat-item {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 14px;
    padding: 14px 12px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.stat-label {
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.5);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.stat-value {
    font-size: 0.85rem;
    color: #f8fbff;
    font-weight: 600;
    word-break: break-word;
}

/* ========== LIGHT MODE ========== */
[data-theme="light"] body {
    background: radial-gradient(circle at top center, rgba(199, 210, 254, 0.7), transparent 30%),
        linear-gradient(180deg, #eef2ff 0%, #e0e7ff 100%);
    color: #1e293b;
}

[data-theme="light"] .container {
    background: rgba(255, 255, 255, 0.92);
    border-color: rgba(99, 102, 241, 0.15);
    box-shadow: 0 28px 90px rgba(79, 70, 229, 0.12);
}

[data-theme="light"] .header {
    background: rgba(255, 255, 255, 0.6);
    border-bottom-color: rgba(99, 102, 241, 0.12);
    color: #1e293b;
}

[data-theme="light"] .header h1,
[data-theme="light"] .header h2 {
    color: #1e293b;
}

[data-theme="light"] .theme-toggle {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(0, 0, 0, 0.12);
}

[data-theme="light"] .form-group label {
    color: #374151;
}

[data-theme="light"] .form-group small {
    color: #64748b;
}

[data-theme="light"] .form-group input {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.12);
    color: #1e293b;
}

[data-theme="light"] .form-group input::placeholder {
    color: rgba(0, 0, 0, 0.35);
}

[data-theme="light"] .form-group input:hover,
[data-theme="light"] .form-group input:focus {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(79, 70, 229, 0.6);
}

[data-theme="light"] .toggle-password {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.12);
    color: #4f46e5;
}

[data-theme="light"] .checkbox-label {
    color: #374151;
}

[data-theme="light"] .form-footer {
    color: #475569;
}

[data-theme="light"] .form-footer a {
    color: #4f46e5;
}

[data-theme="light"] .social-btn {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
    color: #1e293b;
}

[data-theme="light"] .btn-secondary {
    background: rgba(0, 0, 0, 0.06);
    border-color: rgba(0, 0, 0, 0.1);
    color: #1e293b;
}

[data-theme="light"] .alert-success {
    color: #14532d;
}

[data-theme="light"] .alert-error {
    color: #7f1d1d;
}

[data-theme="light"] .alert-info {
    color: #1d4ed8;
}

[data-theme="light"] .link-box {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(99, 102, 241, 0.25);
    color: #1e293b;
}

[data-theme="light"] .link-box a {
    color: #4f46e5;
}

[data-theme="light"] .footer {
    background: rgba(0, 0, 0, 0.04);
    border-top-color: rgba(0, 0, 0, 0.08);
    color: rgba(0, 0, 0, 0.5);
}

[data-theme="light"] .dashboard-name {
    color: #1e293b;
}

[data-theme="light"] .dashboard-email {
    color: #64748b;
}

[data-theme="light"] .stat-item {
    background: rgba(0, 0, 0, 0.04);
    border-color: rgba(0, 0, 0, 0.08);
}

[data-theme="light"] .stat-value {
    color: #1e293b;
}

[data-theme="light"] .stat-label {
    color: rgba(0, 0, 0, 0.45);
}

[data-theme="light"] .password-strength {
    background: #e2e8f0;
}

[data-theme="light"] .check-item {
    color: rgba(220, 38, 38, 0.9);
}

[data-theme="light"] .check-item.valid {
    color: #15803d;
}