/* ============================================================
   Login Page — Professional Authentication UI
   ============================================================ */

body {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 60%, #0f172a 100%);
}

/* ─── Login Card ─── */
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 2.5rem 2rem;
    background-color: #ffffff;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    position: relative;
    overflow: hidden;
    margin: var(--space-4);
}

/* Blue accent bar at top of card */
.login-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), #60a5fa);
}

/* ─── Logo / Brand Mark ─── */
.logo {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    background-color: var(--color-primary-light);
    color: var(--color-primary);
    font-size: 1.5rem;
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-4);
    position: static;
    transform: none;
    left: auto;
}

/* ─── Headings ─── */
h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text-primary);
    margin: 0 0 var(--space-1);
}

p {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-6);
}

/* ─── Error Message ─── */
.error {
    background-color: var(--color-danger-light);
    color: var(--color-danger-text);
    border: 1px solid var(--color-danger-border);
    border-radius: var(--radius-md);
    padding: var(--space-3) var(--space-4);
    font-size: var(--font-size-sm);
    font-weight: 500;
    margin-bottom: var(--space-5);
    text-align: left;
    animation: shake 0.4s ease;
}

/* ─── Form Layout ─── */
form {
    display: flex;
    flex-direction: column;
    text-align: left;
}

.input-container {
    margin-bottom: var(--space-5);
}

/* ─── Labels ─── */
label {
    display: block;
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    margin-bottom: var(--space-2);
}

/* ─── Inputs ─── */
input[type="text"],
input[type="password"] {
    width: 100%;
    padding: 0.7rem 1rem;
    background-color: var(--color-bg-input);
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    color: var(--color-text-primary);
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

input[type="text"]:focus,
input[type="password"]:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12);
    transform: none;
    background-color: #ffffff;
}

input[type="text"]::placeholder,
input[type="password"]::placeholder {
    color: var(--color-text-light);
}

/* ─── Password Toggle Wrapper ─── */
.password-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.password-wrapper input[type="password"],
.password-wrapper input[type="text"] {
    padding-right: 2.8rem;
}

.toggle-password {
    position: absolute;
    right: 12px;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast);
    margin-left: 0;
}

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

.toggle-password i {
    font-size: 1.1rem;
    cursor: pointer;
    user-select: none;
    color: inherit;
}

/* ─── Submit Button ─── */
.login-button {
    width: 100%;
    padding: 0.75rem;
    background-color: var(--color-primary);
    color: #ffffff;
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    margin-top: var(--space-2);
    transition: background-color var(--transition-fast),
                box-shadow var(--transition-fast),
                transform var(--transition-fast);
}

.login-button:hover {
    background-color: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.login-button:active {
    transform: translateY(0);
    box-shadow: none;
}

/* ─── Shake Animation ─── */
@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60%  { transform: translateX(-6px); }
    40%, 80%  { transform: translateX(6px); }
}