/* ============================================================
   LOGIN PAGE — Sistema Grid
   Solar-energy themed split-layout login
   ============================================================ */

/* ---------- Design tokens ---------- */
:root {
    --login-dark: #0f172a;
    --login-dark-alt: #1e293b;
    --login-solar-yellow: #f59e0b;
    --login-solar-orange: #f97316;
    --login-solar-gold: #eab308;
    --login-green: #10b981;
    --login-green-light: #34d399;
    --login-blue: #3b82f6;
    --login-blue-light: #60a5fa;
    --login-white: #ffffff;
    --login-gray-50: #f8fafc;
    --login-gray-100: #f1f5f9;
    --login-gray-200: #e2e8f0;
    --login-gray-300: #cbd5e1;
    --login-gray-400: #94a3b8;
    --login-gray-500: #64748b;
    --login-gray-700: #334155;
    --login-gray-800: #1e293b;
    --login-radius: 12px;
    --login-radius-lg: 16px;
    --login-shadow: 0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -2px rgba(0,0,0,.1);
    --login-shadow-lg: 0 20px 60px -12px rgba(0,0,0,.25);
    --login-transition: .3s cubic-bezier(.4,0,.2,1);
    --login-font: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ---------- Page layout ---------- */
.sg-login-page {
    min-height: 100vh;
    display: flex;
    font-family: var(--login-font);
    background: var(--login-gray-50);
    overflow: hidden;
}

/* ---------- LEFT PANEL — illustration ---------- */
.login-illustration {
    flex: 0 0 50%;
    max-width: 50%;
    background: linear-gradient(135deg, var(--login-dark) 0%, var(--login-dark-alt) 100%);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 3rem;
    overflow: hidden;
}

/* subtle grid background */
.login-illustration::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,.03) 1px, transparent 1px);
    background-size: 40px 40px;
    pointer-events: none;
}

/* soft radial glow */
.login-illustration::after {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(245,158,11,.12) 0%, transparent 70%);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.illustration-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 440px;
}

.illustration-content svg {
    width: 100%;
    max-width: 380px;
    height: auto;
    margin-bottom: 2rem;
}

.illustration-tagline {
    color: var(--login-gray-300);
    font-size: .95rem;
    line-height: 1.7;
    font-weight: 400;
}

.illustration-tagline strong {
    color: var(--login-solar-yellow);
    font-weight: 600;
}

/* ---------- SVG animation keyframes ---------- */
@keyframes sunPulse {
    0%, 100% { opacity: .85; transform: scale(1); }
    50%      { opacity: 1;   transform: scale(1.05); }
}
@keyframes sunRayRotate {
    from { transform: rotate(0deg); }
    to   { transform: rotate(360deg); }
}
@keyframes panelShimmer {
    0%   { opacity: .7; }
    50%  { opacity: 1; }
    100% { opacity: .7; }
}
@keyframes energyFlow {
    0%   { stroke-dashoffset: 20; }
    100% { stroke-dashoffset: 0; }
}
@keyframes dashPulse {
    0%, 100% { opacity: .5; }
    50%      { opacity: 1; }
}
@keyframes floatUp {
    0%, 100% { transform: translateY(0); }
    50%      { transform: translateY(-6px); }
}

.sun-body {
    animation: sunPulse 4s ease-in-out infinite;
    transform-origin: center;
}
.sun-rays {
    animation: sunRayRotate 30s linear infinite;
    transform-origin: center;
}
.solar-panel {
    animation: panelShimmer 3s ease-in-out infinite;
}
.solar-panel:nth-child(2) { animation-delay: .5s; }
.solar-panel:nth-child(3) { animation-delay: 1s; }

.energy-line {
    stroke-dasharray: 6 4;
    animation: energyFlow 1.5s linear infinite;
}
.energy-line:nth-child(2) { animation-delay: .3s; }
.energy-line:nth-child(3) { animation-delay: .6s; }

.dash-element {
    animation: dashPulse 2.5s ease-in-out infinite;
}
.dash-element:nth-child(2) { animation-delay: .4s; }
.dash-element:nth-child(3) { animation-delay: .8s; }

.float-group {
    animation: floatUp 5s ease-in-out infinite;
}

/* ---------- RIGHT PANEL — form ---------- */
.login-form-panel {
    flex: 0 0 50%;
    max-width: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: var(--login-white);
    position: relative;
}

/* decorative corner accent */
.login-form-panel::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle at top right, rgba(245,158,11,.06), transparent 70%);
    pointer-events: none;
}

.login-form-wrapper {
    width: 100%;
    max-width: 420px;
}

/* ---------- Branding ---------- */
.login-brand {
    text-align: center;
    margin-bottom: 2.25rem;
}

.login-brand-icon {
    width: 56px;
    height: 56px;
    border-radius: var(--login-radius);
    background: linear-gradient(135deg, var(--login-solar-yellow), var(--login-solar-orange));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--login-white);
    font-size: 1.5rem;
    margin-bottom: 1rem;
    box-shadow: 0 4px 14px rgba(245,158,11,.35);
}

.login-brand h1 {
    font-size: 1.65rem;
    font-weight: 700;
    color: var(--login-dark);
    margin: 0 0 .35rem;
    letter-spacing: -.025em;
}

.login-brand p {
    color: var(--login-gray-500);
    font-size: .875rem;
    margin: 0;
}

/* ---------- Alerts / errors ---------- */
.login-alert {
    border-radius: var(--login-radius);
    padding: .875rem 1rem;
    font-size: .8125rem;
    border: none;
    margin-bottom: 1.25rem;
    display: flex;
    align-items: flex-start;
    gap: .5rem;
}
.login-alert i {
    margin-top: 2px;
    font-size: .875rem;
}
.login-alert-error {
    background: #fef2f2;
    color: #991b1b;
}
.login-alert-success {
    background: #f0fdf4;
    color: #166534;
}

/* ---------- Form inputs ---------- */
.login-field {
    margin-bottom: 1.25rem;
    position: relative;
}

.login-field label {
    display: block;
    font-size: .8125rem;
    font-weight: 600;
    color: var(--login-gray-700);
    margin-bottom: .4rem;
    letter-spacing: .01em;
}

.login-input-wrap {
    position: relative;
}

.login-input-wrap .input-icon {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--login-gray-400);
    font-size: .9rem;
    transition: color var(--login-transition);
    pointer-events: none;
    z-index: 2;
}

.login-input {
    display: block;
    width: 100%;
    padding: .75rem .875rem .75rem 2.6rem;
    font-size: .9rem;
    font-family: var(--login-font);
    color: var(--login-dark);
    background: var(--login-gray-50);
    border: 1.5px solid var(--login-gray-200);
    border-radius: var(--login-radius);
    transition: all var(--login-transition);
    outline: none;
}

.login-input::placeholder {
    color: var(--login-gray-400);
}

.login-input:hover {
    border-color: var(--login-gray-300);
}

.login-input:focus {
    background: var(--login-white);
    border-color: var(--login-solar-yellow);
    box-shadow: 0 0 0 3px rgba(245,158,11,.15);
}

.login-input:focus ~ .input-icon,
.login-input:focus + .input-icon {
    color: var(--login-solar-yellow);
}

/* when icon is before the input in DOM, handle sibling differently */
.login-input-wrap:focus-within .input-icon {
    color: var(--login-solar-yellow);
}

.login-input.is-invalid {
    border-color: #ef4444;
    background: #fef2f2;
}

/* password toggle */
.password-toggle-btn {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--login-gray-400);
    cursor: pointer;
    padding: 4px;
    font-size: .9rem;
    transition: color var(--login-transition);
    z-index: 2;
}
.password-toggle-btn:hover {
    color: var(--login-gray-700);
}

/* ---------- Remember + Forgot row ---------- */
.login-options {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: .5rem;
}

.login-remember {
    display: flex;
    align-items: center;
    gap: .4rem;
    font-size: .8125rem;
    color: var(--login-gray-700);
    cursor: pointer;
}

.login-remember input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--login-solar-yellow);
    cursor: pointer;
    border-radius: 4px;
}

.login-forgot {
    font-size: .8125rem;
    color: var(--login-solar-yellow);
    text-decoration: none;
    font-weight: 500;
    transition: color var(--login-transition);
}
.login-forgot:hover {
    color: var(--login-solar-orange);
    text-decoration: underline;
}

/* ---------- Submit button ---------- */
.login-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    width: 100%;
    padding: .8rem;
    font-size: .9375rem;
    font-weight: 600;
    font-family: var(--login-font);
    color: var(--login-white);
    background: linear-gradient(135deg, var(--login-solar-yellow), var(--login-solar-orange));
    border: none;
    border-radius: var(--login-radius);
    cursor: pointer;
    transition: all var(--login-transition);
    box-shadow: 0 4px 14px rgba(245,158,11,.3);
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(255,255,255,.15), transparent);
    opacity: 0;
    transition: opacity var(--login-transition);
}

.login-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(245,158,11,.4);
}
.login-btn:hover::before {
    opacity: 1;
}

.login-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(245,158,11,.3);
}

.login-btn:disabled {
    opacity: .65;
    cursor: not-allowed;
    transform: none;
}

.login-btn .spinner-border {
    width: 1.1rem;
    height: 1.1rem;
    border-width: 2px;
    display: none;
}

.login-btn.is-loading .spinner-border {
    display: inline-block;
}
.login-btn.is-loading .btn-label {
    display: none;
}

/* ---------- Divider ---------- */
.login-divider {
    display: flex;
    align-items: center;
    gap: .75rem;
    margin: 1.5rem 0;
    font-size: .75rem;
    color: var(--login-gray-400);
    text-transform: uppercase;
    letter-spacing: .05em;
}
.login-divider::before,
.login-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--login-gray-200);
}

/* ---------- Footer links ---------- */
.login-footer {
    text-align: center;
}

.login-footer-link {
    font-size: .8125rem;
    color: var(--login-gray-500);
    text-decoration: none;
    transition: color var(--login-transition);
}
.login-footer-link i {
    margin-right: .35rem;
}
.login-footer-link:hover {
    color: var(--login-solar-yellow);
}

/* ---------- Floating particles (purely decorative) ---------- */
.login-particles {
    position: absolute;
    inset: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}
.login-particles span {
    position: absolute;
    width: 4px;
    height: 4px;
    background: rgba(245,158,11,.25);
    border-radius: 50%;
    animation: particleDrift 8s ease-in-out infinite;
}
.login-particles span:nth-child(1) { left: 15%; top: 20%; animation-delay: 0s; }
.login-particles span:nth-child(2) { left: 70%; top: 65%; animation-delay: 2s; animation-duration: 10s; }
.login-particles span:nth-child(3) { left: 40%; top: 80%; animation-delay: 4s; animation-duration: 7s; }
.login-particles span:nth-child(4) { left: 80%; top: 25%; animation-delay: 1s; animation-duration: 9s; }
.login-particles span:nth-child(5) { left: 25%; top: 50%; animation-delay: 3s; animation-duration: 11s; }

@keyframes particleDrift {
    0%, 100% { transform: translate(0, 0) scale(1);   opacity: .3; }
    25%      { transform: translate(15px, -20px) scale(1.5); opacity: .6; }
    50%      { transform: translate(-10px, -35px) scale(1);  opacity: .4; }
    75%      { transform: translate(20px, -15px) scale(1.3); opacity: .5; }
}

/* ---------- Page enter animation ---------- */
@keyframes fadeSlideUp {
    from { opacity: 0; transform: translateY(18px); }
    to   { opacity: 1; transform: translateY(0); }
}

.login-form-wrapper {
    animation: fadeSlideUp .6s ease-out both;
}

.illustration-content {
    animation: fadeSlideUp .6s .15s ease-out both;
}

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

/* Tablet / smaller laptops */
@media (max-width: 1024px) {
    .login-illustration {
        flex: 0 0 45%;
        max-width: 45%;
        padding: 2rem;
    }
    .login-form-panel {
        flex: 0 0 55%;
        max-width: 55%;
    }
    .illustration-content svg {
        max-width: 300px;
    }
}

/* Mobile — stack vertically */
@media (max-width: 768px) {
    .sg-login-page {
        flex-direction: column;
    }

    .login-illustration {
        flex: none;
        max-width: 100%;
        width: 100%;
        padding: 2rem 1.5rem 1.5rem;
        min-height: auto;
    }

    .illustration-content svg {
        max-width: 220px;
        margin-bottom: 1rem;
    }

    .illustration-tagline {
        font-size: .85rem;
        display: none; /* hide on small screens for cleaner look */
    }

    .login-form-panel {
        flex: 1;
        max-width: 100%;
        width: 100%;
        padding: 1.5rem;
    }

    .login-form-wrapper {
        max-width: 100%;
    }
}

/* Very small phones */
@media (max-width: 400px) {
    .login-illustration {
        padding: 1.25rem 1rem;
    }
    .illustration-content svg {
        max-width: 160px;
    }
    .login-form-panel {
        padding: 1rem;
    }
    .login-brand h1 {
        font-size: 1.35rem;
    }
}