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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #0f172a;
    --light: #f8fafc;
    --muted: #64748b;
    --border: #e2e8f0;
    --danger: #dc2626;
    --white: #ffffff;
    --shadow: 0 24px 60px rgba(15, 23, 42, 0.18);
    --radius: 24px;
}

body {
    min-height: 100vh;
    font-family: Arial, Helvetica, sans-serif;
    background:
        radial-gradient(circle at top left, rgba(37, 99, 235, 0.18), transparent 35%),
        linear-gradient(135deg, #eff6ff 0%, #f8fafc 45%, #e0f2fe 100%);
    color: var(--secondary);
}

.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 32px;
}

.login-wrapper {
    width: 100%;
    max-width: 1100px;
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}

.login-brand {
    padding: 32px;
}

.brand-badge {
    width: 76px;
    height: 76px;
    border-radius: 24px;
    background: linear-gradient(135deg, var(--primary), #38bdf8);
    color: var(--white);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    font-weight: 800;
    box-shadow: 0 18px 40px rgba(37, 99, 235, 0.35);
    margin-bottom: 28px;
}

.login-brand h1 {
    font-size: 54px;
    line-height: 1.05;
    margin-bottom: 18px;
    letter-spacing: -1.5px;
}

.login-brand p {
    max-width: 520px;
    font-size: 17px;
    line-height: 1.8;
    color: var(--muted);
}

.login-card {
    background: rgba(255, 255, 255, 0.86);
    backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.8);
    border-radius: var(--radius);
    padding: 36px;
    box-shadow: var(--shadow);
}

.login-header {
    margin-bottom: 28px;
}

.login-header h2 {
    font-size: 30px;
    margin-bottom: 8px;
    letter-spacing: -0.7px;
}

.login-header p {
    color: var(--muted);
    font-size: 15px;
}

.alert {
    padding: 13px 15px;
    border-radius: 14px;
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-danger {
    background: #fef2f2;
    color: var(--danger);
    border: 1px solid #fecaca;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 8px;
}

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

.input-icon {
    position: absolute;
    left: 15px;
    font-size: 16px;
    opacity: 0.75;
}

.input-box input {
    width: 100%;
    height: 52px;
    padding: 0 48px;
    border: 1px solid var(--border);
    border-radius: 16px;
    background: var(--white);
    color: var(--secondary);
    font-size: 15px;
    outline: none;
    transition: 0.25s ease;
}

.input-box input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.13);
}

.input-box input.input-error {
    border-color: var(--danger);
    box-shadow: 0 0 0 4px rgba(220, 38, 38, 0.12);
}

.toggle-password {
    position: absolute;
    right: 12px;
    width: 36px;
    height: 36px;
    border: none;
    border-radius: 12px;
    background: #f1f5f9;
    cursor: pointer;
    transition: 0.25s ease;
}

.toggle-password:hover {
    background: #e2e8f0;
}

.error-text {
    display: block;
    margin-top: 7px;
    color: var(--danger);
    font-size: 12px;
    min-height: 16px;
}

.form-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 24px;
    font-size: 14px;
}

.remember-me {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--muted);
    cursor: pointer;
}

.remember-me input {
    width: 15px;
    height: 15px;
    accent-color: var(--primary);
}

.forgot-link {
    color: var(--primary);
    font-weight: 700;
    text-decoration: none;
}

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

.btn-login {
    width: 100%;
    height: 54px;
    border: none;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    font-size: 16px;
    font-weight: 800;
    cursor: pointer;
    box-shadow: 0 16px 30px rgba(37, 99, 235, 0.28);
    transition: 0.25s ease;
    position: relative;
    overflow: hidden;
}

.btn-login:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 36px rgba(37, 99, 235, 0.34);
}

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

.btn-login:disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

.btn-loader {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.4);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

.btn-login.is-loading .btn-text {
    display: none;
}

.btn-login.is-loading .btn-loader {
    display: block;
}

.login-footer {
    margin-top: 26px;
    text-align: center;
    color: var(--muted);
    font-size: 13px;
}

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

/* Tablet */
@media (max-width: 900px) {
    .login-wrapper {
        grid-template-columns: 1fr;
        max-width: 560px;
        gap: 24px;
    }

    .login-brand {
        text-align: center;
        padding: 8px;
    }

    .brand-badge {
        margin-left: auto;
        margin-right: auto;
    }

    .login-brand h1 {
        font-size: 40px;
    }

    .login-brand p {
        margin: 0 auto;
    }
}

/* Mobile */
@media (max-width: 520px) {
    .login-page {
        padding: 18px;
    }

    .login-card {
        padding: 26px 22px;
        border-radius: 20px;
    }

    .login-brand h1 {
        font-size: 34px;
    }

    .login-brand p {
        font-size: 15px;
    }

    .form-options {
        align-items: flex-start;
        flex-direction: column;
    }

    .input-box input {
        height: 50px;
        font-size: 14px;
    }
}