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

:root {
    --bg-primary: #050810;
    --bg-secondary: #0a0f1c;
    --bg-card: #131c2e;
    --accent-cyan: #00e0ff;
    --accent-electric: #0099ff;
    --accent-lime: #aaff00;
    --accent-orange: #ff7b00;
    --accent-purple: #7c3aed;
    --accent-red: #ff3860;
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.1);
    --video-color: #0a1a2e;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Back button */
.back-btn {
    position: fixed;
    top: 25px;
    left: 25px;
    z-index: 100;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 18px;
    background: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: all 0.3s;
}

.back-btn:hover {
    background: rgba(0, 224, 255, 0.1);
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
    transform: translateX(-3px);
}

/* Main container */
.auth-container {
    min-height: 100vh;
    display: grid;
    grid-template-columns: 1fr 1fr;
}

/* ═══════════════ LEFT SIDE - VISUAL WITH VIDEO ═══════════════ */
.auth-visual {
    background: linear-gradient(180deg,
            #0a1a2e 0%,
            #0a1a2e 40%,
            transparent 100%);
    padding: 60px;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
    min-height: 100vh;
}

/* Video container - fills bottom half */
.visual-video-container {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60%;
    z-index: 1;
    overflow: hidden;
}

.visual-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Blend overlay */
.video-blend-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 200px;
    background: linear-gradient(180deg,
            #0a1a2e 0%,
            rgba(10, 26, 46, 0.9) 30%,
            rgba(10, 26, 46, 0.5) 60%,
            transparent 100%);
    z-index: 2;
    pointer-events: none;
}

/* Top content - all centered */
.visual-top {
    position: relative;
    z-index: 3;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.visual-logo {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: white;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: 2px;
    font-size: 1.1rem;
    margin-bottom: 60px;
    justify-content: center;
}

.logo-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-electric));
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--bg-primary);
    box-shadow: 0 8px 20px rgba(0, 224, 255, 0.4);
}

.visual-title {
    font-size: 4.5rem;
    font-weight: 900;
    line-height: 1;
    margin-bottom: 25px;
    letter-spacing: -3px;
    color: white;
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

.visual-title .gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.visual-subtitle {
    font-size: 1.15rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 450px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    font-weight: 400;
    margin-left: auto;
    margin-right: auto;
}

.visual-subtitle strong {
    color: var(--accent-lime);
    font-weight: 700;
}

/* ═══════════════ FRIENDS SECTION ═══════════════ */
.visual-friends {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
    margin-top: 10px;
}

.friends-avatars {
    display: flex;
    align-items: center;
    justify-content: center;
}

.friend-avatar {
    width: 55px;
    height: 55px;
    border-radius: 50%;
    border: 3px solid #0a1a2e;
    margin-left: -15px;
    background-size: cover;
    background-position: center;
    transition: all 0.3s;
    cursor: pointer;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    animation: avatarPulse 3s ease-in-out infinite;
}

.friend-avatar:first-child {
    margin-left: 0;
}

.friend-avatar:hover {
    transform: translateY(-8px) scale(1.1);
    z-index: 10;
    border-color: var(--accent-cyan);
    box-shadow: 0 8px 25px rgba(0, 224, 255, 0.4);
}

/* Different colored gradient avatars */
.avatar-1 {
    background: linear-gradient(135deg, #00e0ff, #0099ff);
}

.avatar-2 {
    background: linear-gradient(135deg, #aaff00, #00ff88);
}

.avatar-3 {
    background: linear-gradient(135deg, #ff7b00, #ffaa00);
}

.avatar-4 {
    background: linear-gradient(135deg, #7c3aed, #ff3860);
}

.avatar-more {
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-cyan);
    font-weight: 900;
    font-size: 1.5rem;
    border-color: var(--accent-cyan);
}

/* Fake face patterns on avatars */
.friend-avatar::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 50%;
    background-image:
        radial-gradient(circle at 35% 40%, rgba(255, 255, 255, 0.3) 8%, transparent 12%),
        radial-gradient(circle at 65% 40%, rgba(255, 255, 255, 0.3) 8%, transparent 12%),
        radial-gradient(circle at 50% 65%, transparent 15%, rgba(255, 255, 255, 0.2) 20%, transparent 25%);
    pointer-events: none;
}

.avatar-more::after {
    display: none;
}

/* Friends text */
.friends-text {
    font-size: 1.05rem;
    color: white;
    font-weight: 600;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.5);
    letter-spacing: 0.3px;
}

.friends-text .gradient-text {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-lime));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

/* Avatar animations */
@keyframes avatarPulse {

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

    50% {
        transform: translateY(-3px);
    }
}

.friend-avatar:nth-child(1) {
    animation-delay: 0s;
}

.friend-avatar:nth-child(2) {
    animation-delay: 0.5s;
}

.friend-avatar:nth-child(3) {
    animation-delay: 1s;
}

.friend-avatar:nth-child(4) {
    animation-delay: 1.5s;
}

.friend-avatar:nth-child(5) {
    animation-delay: 2s;
}

/* Hover wave effect */
.visual-friends:hover .friend-avatar {
    animation: avatarWave 1s ease-in-out;
}

.visual-friends:hover .friend-avatar:nth-child(1) {
    animation-delay: 0s;
}

.visual-friends:hover .friend-avatar:nth-child(2) {
    animation-delay: 0.1s;
}

.visual-friends:hover .friend-avatar:nth-child(3) {
    animation-delay: 0.2s;
}

.visual-friends:hover .friend-avatar:nth-child(4) {
    animation-delay: 0.3s;
}

.visual-friends:hover .friend-avatar:nth-child(5) {
    animation-delay: 0.4s;
}

@keyframes avatarWave {

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

    50% {
        transform: translateY(-15px);
    }
}

/* ═══════════════ RIGHT SIDE - FORM WITH GRID ═══════════════ */
.auth-form-side {
    background: var(--bg-primary);
    padding: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.auth-form-side::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 224, 255, 0.05) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 224, 255, 0.05) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
    opacity: 0.5;
}

.auth-form-side::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -100px;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
    background: radial-gradient(circle,
            rgba(0, 224, 255, 0.1) 0%,
            transparent 70%);
    pointer-events: none;
}

.form-wrapper {
    width: 100%;
    max-width: 450px;
    position: relative;
    z-index: 2;
}

.form-header {
    margin-bottom: 35px;
}

.form-header h2 {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 10px;
    letter-spacing: -1px;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.auth-form {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.3px;
}

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

.input-icon {
    position: absolute;
    left: 16px;
    color: var(--text-secondary);
    pointer-events: none;
    transition: color 0.3s;
    width: 18px;
    height: 18px;
}

.input-wrapper input {
    width: 100%;
    padding: 14px 16px 14px 46px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: 'Inter', sans-serif;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.input-wrapper input:focus {
    outline: none;
    border-color: var(--accent-cyan);
    background: rgba(0, 224, 255, 0.05);
    box-shadow: 0 0 0 3px rgba(0, 224, 255, 0.1);
}

.input-wrapper:focus-within .input-icon {
    color: var(--accent-cyan);
}

.input-wrapper input::placeholder {
    color: var(--text-muted);
}

/* Toggle password button */
.toggle-password {
    position: absolute;
    right: 12px;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 6px;
    border-radius: 6px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-password:hover {
    color: var(--accent-cyan);
    background: rgba(0, 224, 255, 0.1);
}

/* Password strength */
.password-strength {
    margin-top: 8px;
}

.strength-bar {
    height: 4px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 2px;
    margin-bottom: 6px;
    overflow: hidden;
    position: relative;
}

.strength-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: 0;
    transition: all 0.3s;
    border-radius: 2px;
}

.strength-bar.weak::after {
    width: 25%;
    background: var(--accent-red);
}

.strength-bar.medium::after {
    width: 50%;
    background: var(--accent-orange);
}

.strength-bar.good::after {
    width: 75%;
    background: var(--accent-cyan);
}

.strength-bar.strong::after {
    width: 100%;
    background: var(--accent-lime);
}

.strength-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

/* Form options */
.form-options {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 5px 0 10px;
}

.checkbox-wrapper {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.85rem;
    user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
    flex-shrink: 0;
    background: rgba(255, 255, 255, 0.03);
}

.checkbox-wrapper input[type="checkbox"]:checked+.checkmark {
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-electric));
    border-color: var(--accent-cyan);
}

.checkbox-wrapper input[type="checkbox"]:checked+.checkmark::after {
    content: '✓';
    color: var(--bg-primary);
    font-weight: 900;
    font-size: 0.85rem;
}

.terms-checkbox {
    margin: 5px 0;
    font-size: 0.85rem;
    line-height: 1.4;
    align-items: flex-start;
}

.terms-checkbox .checkmark {
    margin-top: 2px;
}

.terms-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 600;
}

.terms-link:hover {
    text-decoration: underline;
}

.forgot-link {
    color: var(--accent-cyan);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: color 0.3s;
}

.forgot-link:hover {
    color: var(--accent-lime);
}

/* Submit button */
.submit-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    width: 100%;
    padding: 15px;
    background: linear-gradient(135deg, var(--accent-cyan), var(--accent-electric));
    color: var(--bg-primary);
    border: none;
    border-radius: 12px;
    font-family: 'Inter', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 8px 25px rgba(0, 224, 255, 0.3);
    margin-top: 5px;
}

.submit-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 35px rgba(0, 224, 255, 0.5);
}

/* Divider */
.divider {
    position: relative;
    text-align: center;
    margin: 10px 0;
}

.divider::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 1px;
    background: var(--border);
}

.divider span {
    position: relative;
    background: var(--bg-primary);
    padding: 0 15px;
    color: var(--text-muted);
    font-size: 0.85rem;
    font-weight: 500;
}

/* Social buttons */
.social-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.social-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 13px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: 12px;
    color: var(--text-primary);
    font-family: 'Inter', sans-serif;
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.3s;
    backdrop-filter: blur(10px);
}

.social-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-2px);
}

/* Form footer */
.form-footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: 15px;
}

.form-footer a {
    color: var(--accent-cyan);
    text-decoration: none;
    font-weight: 700;
}

.form-footer a:hover {
    color: var(--accent-lime);
}

/* ═══════════════ RESPONSIVE ═══════════════ */
@media (max-width: 1100px) {
    .auth-visual {
        padding: 40px;
    }

    .auth-form-side {
        padding: 40px;
    }

    .visual-title {
        font-size: 3.5rem;
    }
}

@media (max-width: 900px) {
    .auth-container {
        grid-template-columns: 1fr;
    }

    .auth-visual {
        min-height: 500px;
        padding: 40px 30px;
        position: relative;
    }

    /* Video takes full background on mobile */
    .visual-video-container {
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        height: 100%;
        width: 100%;
        z-index: 1;
    }

    .visual-video {
        width: 100%;
        height: 100%;
        object-fit: cover;
    }

    .video-blend-overlay {
        position: absolute;
        inset: 0;
        height: 100%;
        background: linear-gradient(180deg,
                rgba(10, 26, 46, 0.85) 0%,
                rgba(10, 26, 46, 0.7) 50%,
                rgba(10, 26, 46, 0.85) 100%);
    }

    .visual-title {
        font-size: 3rem;
        letter-spacing: -2px;
    }

    .visual-logo {
        margin-bottom: 30px;
    }

    .visual-subtitle {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .friend-avatar {
        width: 48px;
        height: 48px;
        margin-left: -12px;
        border-width: 2.5px;
    }

    .friends-text {
        font-size: 0.95rem;
    }

    .auth-form-side {
        padding: 40px 30px;
    }

    .form-header h2 {
        font-size: 2rem;
    }

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

@media (max-width: 500px) {
    .back-btn {
        top: 15px;
        left: 15px;
        padding: 8px 14px;
        font-size: 0.8rem;
    }

    .auth-visual {
        padding: 30px 20px;
        min-height: 400px;
    }

    .auth-form-side {
        padding: 30px 20px;
    }

    .visual-title {
        font-size: 2.5rem;
    }

    .friend-avatar {
        width: 42px;
        height: 42px;
        margin-left: -10px;
    }

    .friends-text {
        font-size: 0.9rem;
    }

    .form-header h2 {
        font-size: 1.7rem;
    }

    .social-buttons {
        grid-template-columns: 1fr;
    }
}

/* ═══════════════ EMOJI INPUT ICONS ═══════════════ */
.input-icon-emoji {
    position: absolute;
    left: 14px;
    font-size: 1.15rem;
    z-index: 2;
    pointer-events: none;
    filter: grayscale(100%) brightness(0.7);
    transition: all 0.3s;
    line-height: 1;
}

.input-wrapper:focus-within .input-icon-emoji {
    filter: grayscale(0%) brightness(1);
    transform: scale(1.1);
}

/* Input padding for emoji icons */
.input-wrapper input {
    padding-left: 44px;
}

/* Eye toggle button */
.toggle-password {
    position: absolute;
    right: 10px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 6px 8px;
    border-radius: 8px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.toggle-password:hover {
    background: rgba(0, 224, 255, 0.1);
}

.eye-icon {
    font-size: 1.1rem;
    filter: grayscale(100%) brightness(0.6);
    transition: all 0.3s;
}

.toggle-password:hover .eye-icon {
    filter: grayscale(0%) brightness(1);
}

/* Button arrow */
.btn-arrow {
    font-size: 1.2rem;
    font-weight: 400;
    transition: transform 0.3s;
}

.submit-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* ═══════════════ FORM MESSAGES ═══════════════ */
.error-message {
    background: rgba(255, 56, 96, 0.1);
    border: 1px solid rgba(255, 56, 96, 0.3);
    color: #ff3860;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    animation: messageSlide 0.3s ease;
}

.success-message {
    background: rgba(170, 255, 0, 0.1);
    border: 1px solid rgba(170, 255, 0, 0.3);
    color: #aaff00;
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 0.85rem;
    font-weight: 500;
    text-align: center;
    animation: messageSlide 0.3s ease;
}

@keyframes messageSlide {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }

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

/* ═══════════════ BUTTON LOADING SPINNER ═══════════════ */
.submit-btn {
    position: relative;
    min-height: 50px;
}

.submit-btn.loading {
    pointer-events: none;
    opacity: 0.8;
}

.submit-btn .btn-text {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    transition: opacity 0.3s, transform 0.3s;
}

.submit-btn.loading .btn-text {
    opacity: 0;
    transform: scale(0.8);
}

.btn-spinner {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 24px;
    height: 24px;
    border: 3px solid rgba(5, 8, 16, 0.3);
    border-top: 3px solid var(--bg-primary);
    border-radius: 50%;
    opacity: 0;
    transition: opacity 0.3s;
    animation: spin 0.8s linear infinite;
}

.submit-btn.loading .btn-spinner {
    opacity: 1;
}

@keyframes spin {
    0% {
        transform: translate(-50%, -50%) rotate(0deg);
    }

    100% {
        transform: translate(-50%, -50%) rotate(360deg);
    }
}

/* Success state */
.submit-btn.success {
    background: linear-gradient(135deg, #aaff00, #00ff88) !important;
    pointer-events: none;
}

.submit-btn.success .btn-text {
    opacity: 1;
    transform: scale(1);
}

/* Error shake */
.submit-btn.error {
    animation: btnShake 0.5s ease;
}

@keyframes btnShake {

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

    20% {
        transform: translateX(-8px);
    }

    40% {
        transform: translateX(8px);
    }

    60% {
        transform: translateX(-4px);
    }

    80% {
        transform: translateX(4px);
    }
}