/* ============================================
   Premium Authentication Modal
   Clean, Minimalist Design - Uber/Airbnb Style
   ============================================ */

/* Modal Overlay */
.auth-modal {
    position: fixed;
    inset: 0;
    z-index: 10000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    animation: fadeIn 0.2s ease;
}

.auth-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Modal Container */
.auth-container {
    position: relative;
    width: 100%;
    max-width: 400px;
    max-height: 90vh;
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: slideUp 0.3s cubic-bezier(0.32, 0.72, 0, 1);
    overflow: hidden;
}

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

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

/* Close Button */
.auth-close-btn {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    z-index: 10;
    color: #666;
}

.auth-close-btn:hover {
    background: #e8e8e8;
    color: #000;
}

/* Steps */
.auth-step {
    display: none;
}

.auth-step.active {
    display: block;
    animation: stepFade 0.3s ease;
}

@keyframes stepFade {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Content */
.auth-content {
    padding: 48px 32px 32px;
}

.auth-content.center {
    text-align: center;
}

/* Back Button */
.back-btn {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 36px;
    height: 36px;
    border: none;
    background: #f5f5f5;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
    color: #666;
}

.back-btn:hover {
    background: #e8e8e8;
    color: #000;
}

/* Header */
.auth-header {
    margin-bottom: 32px;
}

.auth-title {
    font-size: 28px;
    font-weight: 600;
    color: #000;
    margin: 0 0 12px;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.auth-desc {
    font-size: 16px;
    color: #717171;
    margin: 0;
    line-height: 1.5;
}

.auth-desc strong {
    color: #000;
    font-weight: 600;
}

/* Phone Field */
.input-group {
    margin-bottom: 24px;
}

.phone-field {
    display: flex;
    align-items: center;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    background: #fff;
    transition: all 0.2s ease;
    overflow: hidden;
}

.phone-field:focus-within {
    border-color: #000;
}

.country-select {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: #f7f7f7;
    cursor: pointer;
    transition: background 0.2s;
}

.country-select:hover {
    background: #f0f0f0;
}

.flag {
    font-size: 20px;
}

.code {
    font-size: 16px;
    font-weight: 600;
    color: #000;
}

.divider {
    width: 1px;
    height: 24px;
    background: #e0e0e0;
}

.phone-input {
    flex: 1;
    border: none;
    background: transparent;
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    color: #000;
    outline: none;
}

.phone-input::placeholder {
    color: #b0b0b0;
    font-weight: 400;
}

/* Text Field */
.text-field {
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    background: #fff;
    transition: all 0.2s ease;
    overflow: hidden;
}

.text-field:focus-within {
    border-color: #000;
}

.text-input {
    width: 100%;
    border: none;
    background: transparent;
    padding: 16px;
    font-size: 16px;
    font-weight: 500;
    color: #000;
    outline: none;
    box-sizing: border-box;
}

.text-input::placeholder {
    color: #b0b0b0;
    font-weight: 400;
}

/* OTP Inputs */
.otp-group {
    margin-bottom: 24px;
}

.otp-inputs {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.otp-box-auth {
    width: 48px;
    height: 56px;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    text-align: center;
    font-size: 22px;
    font-weight: 600;
    color: #000;
    background: #fff;
    outline: none;
    transition: all 0.2s ease;
    caret-color: #000;
}

.otp-box-auth:focus {
    border-color: #000;
    background: #fafafa;
}

.otp-box-auth:not(:placeholder-shown) {
    border-color: #22c55e;
    background: #f0fdf4;
}

/* Buttons */
.auth-btn {
    width: 100%;
    padding: 16px 24px;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-btn.primary {
    background: #000;
    color: #fff;
}

.auth-btn.primary:hover:not(:disabled) {
    background: #222;
    transform: translateY(-1px);
}

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

.auth-btn.primary:disabled {
    background: #e0e0e0;
    color: #999;
    cursor: not-allowed;
}

.auth-btn.secondary {
    background: #f5f5f5;
    color: #000;
    margin-top: 12px;
}

.auth-btn.secondary:hover {
    background: #e8e8e8;
}

/* Spinner */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Terms */
.auth-terms {
    font-size: 13px;
    color: #717171;
    text-align: center;
    margin: 24px 0 0;
    line-height: 1.5;
}

.auth-terms a {
    color: #000;
    font-weight: 500;
    text-decoration: underline;
}

.auth-terms a:hover {
    color: #555;
}

/* Resend Section */
.resend-section {
    text-align: center;
    margin-top: 24px;
}

.timer-text {
    font-size: 14px;
    color: #717171;
}

.timer-text strong {
    color: #000;
}

.resend-btn {
    background: none;
    border: none;
    font-size: 14px;
    font-weight: 600;
    color: #000;
    cursor: pointer;
    padding: 8px;
    text-decoration: underline;
}

.resend-btn:hover {
    color: #555;
}

/* Success Icon */
.success-icon {
    width: 80px;
    height: 80px;
    background: #22c55e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: #fff;
    animation: popIn 0.4s cubic-bezier(0.32, 0.72, 0, 1);
}

@keyframes popIn {
    0% {
        transform: scale(0);
    }

    70% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

/* Welcome Avatar */
.welcome-avatar {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 40px;
    animation: popIn 0.4s cubic-bezier(0.32, 0.72, 0, 1);
}

.welcome-avatar span {
    animation: wave 1s ease-in-out;
}

@keyframes wave {

    0%,
    100% {
        transform: rotate(0deg);
    }

    25% {
        transform: rotate(20deg);
    }

    75% {
        transform: rotate(-20deg);
    }
}

/* Quick Stats */
.quick-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 32px;
    padding: 20px;
    background: #f7f7f7;
    border-radius: 12px;
    margin: 24px 0;
}

.stat {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.stat-num {
    font-size: 24px;
    font-weight: 700;
    color: #000;
}

.stat-label {
    font-size: 12px;
    color: #717171;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 4px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: #e0e0e0;
}

/* Mobile Responsive */
@media (max-width: 480px) {
    .auth-container {
        max-width: 100%;
        max-height: 100vh;
        border-radius: 0;
        height: 100%;
    }

    .auth-modal {
        padding: 0;
    }

    .auth-content {
        padding: 60px 24px 32px;
    }

    .auth-title {
        font-size: 24px;
    }

    .otp-box-auth {
        width: 44px;
        height: 52px;
        font-size: 20px;
    }
}

/* Loading State */
.auth-btn.loading .btn-text {
    display: none;
}

.auth-btn.loading .btn-loader {
    display: flex !important;
}