:root {
    --bg-gradient: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 50%, #e2e8f0 100%);
    --card-bg: #ffffff;
    --card-border: #e2e8f0;
    --input-bg: #f8fafc;
    --input-border: #cbd5e1;
    --input-focus-border: #2563eb;
    --input-focus-shadow: rgba(37, 99, 235, 0.15);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --accent-primary: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
    --accent-hover: linear-gradient(135deg, #1d4ed8 0%, #1e40af 100%);
    --error-color: #ef4444;
    --success-color: #22c55e;
}

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

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-gradient);
    background-attachment: fixed;
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
    position: relative;
    padding: 20px 16px;
}

/* Decorative background elements */
.decor-circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(120px);
    z-index: 0;
    pointer-events: none;
    opacity: 0.6;
}

.circle-1 {
    width: 400px;
    height: 400px;
    background: #dbeafe;
    top: -100px;
    left: -100px;
    animation: float-slow 15s infinite alternate;
}

.circle-2 {
    width: 500px;
    height: 500px;
    background: #eff6ff;
    bottom: -150px;
    right: -150px;
    animation: float-slow 20s infinite alternate-reverse;
}

@keyframes float-slow {
    0% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, 30px) scale(1.1); }
    100% { transform: translate(-30px, -50px) scale(0.9); }
}

.login-container {
    width: 100%;
    max-width: 680px;
    z-index: 10;
}

.login-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 24px 32px;
    box-shadow: 0 20px 40px rgba(15, 23, 42, 0.08);
    transform: translateY(20px);
    opacity: 0;
    animation: slide-up 0.8s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

@keyframes slide-up {
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.logo-area {
    text-align: center;
    margin-bottom: 16px;
}

.logo-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--accent-primary);
    border-radius: 12px;
    margin-bottom: 8px;
    box-shadow: 0 6px 16px rgba(37, 99, 235, 0.2);
}

.logo-icon svg {
    width: 22px;
    height: 22px;
    color: #fff;
}

.logo-area h1 {
    font-family: 'Inter', sans-serif;
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(to right, #0f172a, #2563eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 4px;
}

.logo-area p {
    color: var(--text-secondary);
    font-size: 13px;
}

/* Forms inputs */
.form-group {
    position: relative;
    margin-bottom: 12px;
}

.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
    transition: color 0.3s;
}

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

.input-icon {
    position: absolute;
    left: 14px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    pointer-events: none;
    transition: color 0.3s;
}

.input-icon svg {
    width: 18px;
    height: 18px;
}

.form-input {
    width: 100%;
    padding: 10px 44px 10px 42px;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 12px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    outline: none;
}

.form-input::placeholder {
    color: rgba(71, 85, 105, 0.4);
}

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

.form-group:focus-within .form-label {
    color: #2563eb;
}

.form-group:focus-within .input-icon {
    color: #2563eb;
}

.password-toggle {
    position: absolute;
    right: 14px;
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.3s;
}

.password-toggle:hover {
    color: var(--text-primary);
}

.password-toggle svg {
    width: 20px;
    height: 20px;
}

/* Error States */
.input-error {
    border-color: var(--error-color) !important;
}

.input-error:focus {
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.15) !important;
}

.error-message {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--error-color);
    font-size: 13px;
    margin-top: 8px;
    animation: fade-in 0.3s ease-out forwards;
}

.error-message svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Alert Banner */
.alert-banner {
    background: rgba(239, 68, 68, 0.08);
    border: 1px solid rgba(239, 68, 68, 0.18);
    border-radius: 12px;
    padding: 12px 16px;
    margin-bottom: 24px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    animation: fade-in 0.3s ease-out forwards;
}

.alert-banner svg {
    width: 20px;
    height: 20px;
    color: var(--error-color);
    flex-shrink: 0;
    margin-top: 2px;
}

.alert-banner-content {
    color: #b91c1c;
    font-size: 14px;
    line-height: 1.4;
}

/* Submit Button */
.btn-submit {
    width: 100%;
    padding: 11px;
    background: var(--accent-primary);
    border: none;
    border-radius: 12px;
    color: #fff;
    font-family: inherit;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
    overflow: hidden;
    margin-top: 12px;
}

.btn-submit::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.2),
        transparent
    );
    transition: 0.5s;
}

.btn-submit:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
}

.btn-submit:hover::after {
    left: 100%;
    transition: 0.7s;
}

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

.btn-back {
    display: flex;
    width: 100%;
    padding: 10px;
    background: #f1f5f9;
    border: 1px solid var(--card-border);
    border-radius: 12px;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
    margin-top: 8px;
}

.btn-back:hover {
    background: #e2e8f0;
    color: var(--text-primary);
    transform: translateY(-1px);
}

/* Footer */
.login-footer {
    text-align: center;
    margin-top: 16px;
    font-size: 13px;
    color: var(--text-secondary);
}

/* Agreement checkbox styling */
.agreement-group {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    cursor: pointer;
    color: var(--text-secondary);
    user-select: none;
    transition: color 0.3s;
    font-size: 14px;
    margin-top: 12px;
    margin-bottom: 12px;
    line-height: 1.5;
    text-align: left;
}

.agreement-group:hover {
    color: var(--text-primary);
}

.agreement-group input {
    cursor: pointer;
    accent-color: #2563eb;
    width: 18px;
    height: 18px;
    margin-top: 2px;
    flex-shrink: 0;
}

.agreement-group a {
    color: #2563eb;
    text-decoration: none;
    font-weight: 600;
    transition: color 0.3s;
}

.agreement-group a:hover {
    color: #1d4ed8;
    text-decoration: underline;
}

/* Terms Modal styling */
.terms-modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: all 0.3s ease;
    padding: 20px;
}

.terms-modal-overlay.open {
    opacity: 1;
    pointer-events: auto;
}

.terms-modal-card {
    background: #ffffff;
    border: 1px solid var(--card-border);
    border-radius: 20px;
    max-width: 550px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.15);
    transform: scale(0.95);
    transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    display: flex;
    flex-direction: column;
    text-align: left;
}

.terms-modal-overlay.open .terms-modal-card {
    transform: scale(1);
}

.terms-modal-header {
    padding: 24px 24px 16px;
    border-bottom: 1px solid var(--card-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.terms-modal-header h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.terms-modal-close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s;
}

.terms-modal-close-btn:hover {
    background: #f1f5f9;
    color: var(--text-primary);
}

.terms-modal-body {
    padding: 24px;
    overflow-y: auto;
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.terms-section-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-top: 20px;
    margin-bottom: 10px;
}

.terms-section-title:first-child {
    margin-top: 0;
}

.terms-list {
    padding-left: 20px;
    margin-bottom: 16px;
}

.terms-list li {
    margin-bottom: 8px;
}

.terms-modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--card-border);
    display: flex;
    justify-content: flex-end;
}

.btn-close-modal {
    padding: 10px 20px;
    background: var(--accent-primary);
    color: #ffffff;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

.btn-close-modal:hover {
    background: var(--accent-hover);
}

/* Grid layout for fields */
.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 16px;
    row-gap: 0;
}

.form-group-full {
    grid-column: span 2;
}

@media (max-width: 640px) {
    .login-container {
        max-width: 100%;
    }
    .form-grid {
        grid-template-columns: 1fr;
    }
    .form-group-full {
        grid-column: span 1;
    }
    body {
        padding: 16px 12px;
    }
    .login-card {
        padding: 20px 20px;
    }
}