/* =====================================================================
   MINIMALISMO PROFESIONAL — Login Guerrero
   ===================================================================== */

:root {
    /* Brand Colors */
    --color-primary: #9F2241;
    --color-primary-hover: #7a1a31;
    --color-primary-light: rgba(159, 34, 65, 0.08);

    /* Text */
    --color-text-primary: #1a1a1a;
    --color-text-secondary: #666;
    --color-text-tertiary: #999;
    --color-text-muted: #b3b3b3;

    /* Surfaces */
    --color-bg-page: #fafafa;
    --color-bg-card: #ffffff;
    --color-border: #e5e5e5;
    --color-border-light: #f0f0f0;

    /* Semantic */
    --color-error: #d32f2f;
    --color-error-bg: #ffebee;
    --color-warning: #f57c00;
    --color-warning-bg: #fff3e0;

    /* Spacing Scale — Base 8px */
    --sp-xs: 4px;
    --sp-sm: 8px;
    --sp-md: 12px;
    --sp-lg: 16px;
    --sp-xl: 24px;
    --sp-2xl: 32px;
    --sp-3xl: 48px;

    /* Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);

    /* Transitions */
    --trans-fast: 120ms cubic-bezier(0.23, 1, 0.32, 1);
    --trans-base: 200ms cubic-bezier(0.23, 1, 0.32, 1);
    --trans-slow: 300ms cubic-bezier(0.23, 1, 0.32, 1);
}

/* =====================================================================
   RESET & TYPOGRAPHY
   ===================================================================== */

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Open Sans', sans-serif;
    background: var(--color-bg-page);
    color: var(--color-text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.app-background {
    position: fixed;
    inset: 0;
    z-index: -1;
    background: #34465d;
}

/* =====================================================================
   LOGIN LAYOUT
   ===================================================================== */

.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--sp-lg);
}

.login-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-left: 4px solid var(--color-primary);
    animation: cardSlideIn var(--trans-base) ease-out;
    overflow: hidden;
}

@keyframes cardSlideIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--sp-2xl);
    padding: var(--sp-3xl) var(--sp-2xl);
}

/* =====================================================================
   LOGO SECTION
   ===================================================================== */

.login-logo-section {
    text-align: center;
    margin-bottom: var(--sp-sm);
}

.login-logo img {
    height: 100px;
    width: auto;
    display: block;
    margin: 0 auto;
    opacity: 0.95;
}

/* =====================================================================
   HEADER SECTION
   ===================================================================== */

.login-header-section {
    text-align: center;
}

.login-title {
    font-size: 28px;
    font-weight: 600;
    margin: 0 0 var(--sp-sm) 0;
    color: var(--color-text-primary);
    line-height: 1.2;
    letter-spacing: -0.3px;
}

.login-subtitle {
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-tertiary);
    margin: 0;
    text-transform: none;
    letter-spacing: 0;
}

/* =====================================================================
   ALERTS
   ===================================================================== */

.login-alerts {
    display: flex;
    flex-direction: column;
    gap: var(--sp-md);
}

.login-alerts .alert {
    font-size: 13px;
    border: none;
    border-radius: var(--radius-md);
    padding: var(--sp-md) var(--sp-lg);
    margin: 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--sp-lg);
    animation: alertSlideIn var(--trans-fast) ease-out;
}

@keyframes alertSlideIn {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-alerts .alert-danger {
    background: var(--color-error-bg);
    color: #b71c1c;
}

.login-alerts .alert-warning {
    background: var(--color-warning-bg);
    color: #e65100;
}

.login-alerts .alert-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.login-alerts .alert strong {
    font-weight: 600;
    display: block;
}

.login-alerts .alert span {
    font-weight: 400;
    font-size: 12px;
    opacity: 0.95;
}

.login-alerts .alert-close {
    cursor: pointer;
    background: none;
    border: none;
    padding: 0;
    font-size: 20px;
    line-height: 1;
    opacity: 0.5;
    flex-shrink: 0;
    transition: opacity var(--trans-fast);
}

.login-alerts .alert-close:hover {
    opacity: 1;
}

/* =====================================================================
   FORM FIELDS
   ===================================================================== */

.login-fields {
    display: flex;
    flex-direction: column;
    gap: var(--sp-xl);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--sp-sm);
    position: relative;
}

.form-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.4px;
    margin: 0;
    display: block;
}

.form-control {
    padding: var(--sp-md) 0;
    font-size: 15px;
    font-weight: 400;
    background: transparent;
    border: none;
    border-bottom: 1.5px solid var(--color-border);
    color: var(--color-text-primary);
    font-family: inherit;
    width: 100%;
    transition: border-color var(--trans-base),
                padding-bottom var(--trans-base);
    outline: none;
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

.form-control:hover {
    border-bottom-color: #d0d0d0;
}

.form-control:focus {
    border-bottom-color: var(--color-primary);
    padding-bottom: calc(var(--sp-md) - 1px);
}

.form-control:disabled {
    color: var(--color-text-tertiary);
    cursor: not-allowed;
    opacity: 0.6;
}

.form-underline {
    position: absolute;
    bottom: -1.5px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--trans-base);
    pointer-events: none;
}

.form-control:focus ~ .form-underline {
    transform: scaleX(1);
}

/* =====================================================================
   BUTTON
   ===================================================================== */

.login-button {
    padding: 12px 24px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    border: none;
    border-radius: var(--radius-md);
    background: var(--color-primary);
    color: #ffffff;
    cursor: pointer;
    font-family: inherit;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--sp-md);
    transition: background var(--trans-base),
                box-shadow var(--trans-base),
                transform var(--trans-fast);
    box-shadow: var(--shadow-sm);
    margin-top: var(--sp-md);
}

.login-button:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.login-button:active:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.login-button:focus:not(:disabled) {
    outline: none;
    box-shadow: var(--shadow-md), 0 0 0 3px var(--color-primary-light);
}

.login-button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.login-button i {
    font-size: 12px;
    opacity: 0.9;
}

/* =====================================================================
   FOOTER
   ===================================================================== */

.login-footer {
    font-size: 11px;
    font-weight: 500;
    color: var(--color-text-tertiary);
    text-align: center;
    margin: 0;
    letter-spacing: 0.2px;
}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */

@media (max-width: 480px) {
    .login-container {
        padding: var(--sp-md);
    }

    .login-form {
        padding: var(--sp-2xl) var(--sp-lg);
        gap: var(--sp-xl);
    }

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

    .login-logo img {
        height: 48px;
    }

    .login-card {
        border-left-width: 3px;
    }
}

@media (max-width: 360px) {
    .login-form {
        padding: var(--sp-xl) var(--sp-lg);
        gap: var(--sp-lg);
    }

    .login-title {
        font-size: 22px;
    }

    .login-fields {
        gap: var(--sp-lg);
    }

    .login-button {
        font-size: 13px;
        padding: 11px 20px;
    }
}

/* =====================================================================
   ACCESSIBILITY & DARK MODE
   ===================================================================== */

@media (prefers-reduced-motion: reduce) {
    .login-card,
    .login-button,
    .login-alerts .alert,
    .form-control,
    .form-underline {
        animation: none !important;
        transition: none !important;
    }

    .login-button:hover {
        transform: none;
    }
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-text-primary: #e8e8e8;
        --color-text-secondary: #b0b0b0;
        --color-text-tertiary: #888;
        --color-text-muted: #666;
        --color-bg-page: #0d0d0d;
        --color-bg-card: #1a1a1a;
        --color-border: #333;
        --color-border-light: #2a2a2a;
    }

    .login-card {
        box-shadow: var(--shadow-lg);
    }
}

@media (prefers-contrast: more) {
    .login-card {
        border-left-width: 6px;
    }

    .form-label {
        font-weight: 700;
    }

    .login-button {
        font-weight: 700;
    }
}