/**
 * @package     Joomla.Administrator
 * @subpackage  Templates.isis
 *
 * @copyright   (C) 2026 JoomlaWorks Ltd. and this project's contributors
 * @license     GNU General Public License version 2 or later; see LICENSE.md
 *
 * The administrator login page (login.php and html/mod_login): plain CSS, no Bootstrap.
 */

/* --- Tokens --- */
:root {
    --font:            system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif;
    --c-page:          #f6f7fb;
    --c-panel:         #ffffff;
    --c-text:          #161a2b;
    --c-muted:         #5b6178;
    --c-line:          #d9dce8;
    --c-field:         #ffffff;
    --c-accent:        #5b3df5;
    --c-accent-strong: #4426e0;
    --c-focus:         rgba(91, 61, 245, 0.28);
    --c-error-bg:      #fdecec;
    --c-error-text:    #8f1d1d;
    --c-info-bg:       #eaf1ff;
    --c-info-text:     #1d3d8f;
    --c-ok-bg:         #e7f7ee;
    --c-ok-text:       #13603a;
    --c-warn-bg:       #fff4dc;
    --c-warn-text:     #7a4b00;
    --radius:          12px;
    --card-shadow:     0 1px 2px rgba(22, 26, 43, 0.04), 0 6px 20px rgba(22, 26, 43, 0.06);
}

@media (prefers-color-scheme:dark) {
    :root {
        --c-page:          #0f111a;
        --c-panel:         #171a26;
        --c-text:          #eceef6;
        --c-muted:         #a4a9bf;
        --c-line:          #2d3245;
        --c-field:         #10121b;
        --c-accent:        #8b74ff;
        --c-accent-strong: #a493ff;
        --c-focus:         rgba(139, 116, 255, 0.35);
        --c-error-bg:      #3a1618;
        --c-error-text:    #ffc9c9;
        --c-info-bg:       #16233f;
        --c-info-text:     #c6d7ff;
        --c-ok-bg:         #12301f;
        --c-ok-text:       #b8ecd0;
        --c-warn-bg:       #33270d;
        --c-warn-text:     #ffe0a3;
        --card-shadow:     0 1px 2px rgba(0, 0, 0, 0.3), 0 6px 20px rgba(0, 0, 0, 0.25);
    }
}

/* --- Page --- */
*,*::before,*::after {box-sizing:border-box;}
html {-webkit-text-size-adjust:100%;text-size-adjust:100%;}
body.loginPage {margin:0;min-height:100vh;background:var(--c-page);color:var(--c-text);font:16px/1.5 var(--font);-webkit-font-smoothing:antialiased;}
.loginLayout {display:grid;grid-template-columns:minmax(0, 3fr) minmax(24rem, 2fr);min-height:100vh;}

/* --- Side panel: the site --- */
.loginBrand {--brand-bg:#2a1fa3;position:relative;display:flex;flex-direction:column;justify-content:center;padding:clamp(2rem, 5vw, 4.5rem);overflow:hidden;isolation:isolate;color:#fff;background:radial-gradient(60% 55% at 12% 10%, #ff5f8f 0, transparent 70%), radial-gradient(55% 50% at 92% 18%, #ffb648 0, transparent 70%), radial-gradient(70% 60% at 78% 92%, #7a3cff 0, transparent 70%), radial-gradient(60% 55% at 6% 96%, #14c4e0 0, transparent 70%), var(--brand-bg);}
/* A slow drift of soft light over the gradient */
.loginBrand::before {content:"";position:absolute;inset:-30%;z-index:-1;background:radial-gradient(35% 35% at 30% 40%, rgba(255, 255, 255, 0.22), transparent 70%), radial-gradient(30% 30% at 70% 65%, rgba(255, 255, 255, 0.14), transparent 70%);animation:loginDrift 24s ease-in-out infinite alternate;}
/* Keeps white text readable on every part of the gradient */
.loginBrand::after {content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg, rgba(14, 10, 50, 0.08) 0%, rgba(14, 10, 50, 0.38) 100%);}
@keyframes loginDrift {from {transform:translate3d(-4%, -3%, 0) rotate(0deg);} to {transform:translate3d(5%, 4%, 0) rotate(8deg);}}
.loginBrand--custom {background:var(--brand-bg);}
.loginBrand--light {color:#141414;}
.loginBrand--custom::before,.loginBrand--light::after {display:none;}
.loginBrand-inner {margin-block:auto;max-width:46rem;}
.loginBrand-site {margin:0;font-size:clamp(2rem, 3.4vw, 2.9rem);font-weight:800;line-height:1.15;letter-spacing:-0.02em;overflow-wrap:anywhere;}
.loginBrand-host {margin:0.75rem 0 2rem;font-size:1.05rem;opacity:0.9;overflow-wrap:anywhere;}
.loginBrand-visit {display:inline-flex;align-items:center;gap:0.6rem;padding:0.85rem 1.4rem;border-radius:999px;background:#fff;color:#1d1550;font-weight:700;text-decoration:none;transition:background-color 0.2s ease;}
.loginBrand-visit svg {transition:transform 0.2s ease;}
.loginBrand-visit:hover,.loginBrand-visit:focus-visible {background:#ffe8ef;}
.loginBrand-visit:hover svg,.loginBrand-visit:focus-visible svg {transform:translateX(3px);}
.loginBrand-visit:focus-visible {outline:3px solid #fff;outline-offset:3px;}
.loginBrand--light .loginBrand-visit {background:#141414;color:#fff;}

/* --- Form panel --- */
.loginMain {display:flex;flex-direction:column;align-items:center;justify-content:center;gap:1.5rem;padding:clamp(1.5rem, 4vw, 3rem) 1rem;}
.loginPanel {width:100%;max-width:25rem;padding:clamp(1.5rem, 4vw, 2.5rem);border:1px solid var(--c-line);border-radius:calc(var(--radius) + 6px);background:var(--c-panel);box-shadow:var(--card-shadow);}
.loginPanel-logo {display:flex;justify-content:center;color:var(--c-text);}
.loginPanel-logo svg,.loginPanel-logo img {display:block;width:auto;max-width:100%;height:2rem;}
.loginPanel-title {margin:1.5rem 0 1.25rem;font-size:1.35rem;text-align:center;font-weight:700;line-height:1.3;letter-spacing:-0.01em;}

/* --- Messages --- */
#system-message-container:empty {display:none;}
#system-message-container .alert {position:relative;margin:0 0 1.25rem;padding:0.85rem 2.5rem 0.85rem 1rem;border-radius:10px;background:var(--c-warn-bg);color:var(--c-warn-text);font-size:0.92rem;}
#system-message-container .alert-error,#system-message-container .alert-danger {background:var(--c-error-bg);color:var(--c-error-text);}
#system-message-container .alert-info {background:var(--c-info-bg);color:var(--c-info-text);}
#system-message-container .alert-success {background:var(--c-ok-bg);color:var(--c-ok-text);}
#system-message-container .alert-heading {margin:0 0 0.2rem;font-size:0.92rem;font-weight:700;}
#system-message-container .close {position:absolute;top:0.45rem;right:0.5rem;width:2rem;height:2rem;padding:0;border:0;border-radius:6px;background:transparent;color:inherit;font:inherit;font-size:1.3rem;line-height:1;cursor:pointer;opacity:0.7;}
#system-message-container .close:hover,#system-message-container .close:focus-visible {opacity:1;background:rgba(0, 0, 0, 0.06);}
.loginNotice {margin:1rem 0 0;color:var(--c-error-text);font-size:0.9rem;}

/* --- Form --- */
.loginForm {display:grid;gap:1.1rem;margin:0;}
.loginField {display:grid;gap:0.4rem;}
.loginField-head {display:flex;flex-wrap:wrap;align-items:baseline;justify-content:space-between;gap:0.25rem 1rem;}
.loginField-head label {font-size:0.92rem;font-weight:600;}
.loginField-head a {color:var(--c-accent);font-size:0.85rem;text-decoration:none;}
.loginField-head a:hover,.loginField-head a:focus-visible {text-decoration:underline;text-underline-offset:3px;}
.loginForm input[type="text"],.loginForm input[type="password"],.loginForm select {width:100%;min-height:3rem;margin:0;padding:0.7rem 0.9rem;border:1px solid var(--c-line);border-radius:var(--radius);background:var(--c-field);color:var(--c-text);font:inherit;transition:border-color 0.15s ease, box-shadow 0.15s ease;}
.loginForm select {-webkit-appearance:none;appearance:none;padding-right:2.5rem;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 9l6 6 6-6' fill='none' stroke='%237a8099' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");background-position:right 0.8rem center;background-repeat:no-repeat;background-size:1.1rem;}
.loginForm input:hover,.loginForm select:hover {border-color:color-mix(in srgb, var(--c-accent) 45%, var(--c-line));}
.loginForm input:focus,.loginForm select:focus {border-color:var(--c-accent);outline:none;box-shadow:0 0 0 4px var(--c-focus);}
.loginField-help {margin:0;color:var(--c-muted);font-size:0.82rem;}
/* Show/hide password, inside the field */
.loginField-reveal {position:relative;}
.loginField-reveal input {padding-right:3.25rem;}
.loginReveal {position:absolute;top:50%;right:0.35rem;display:inline-flex;align-items:center;justify-content:center;width:2.5rem;height:2.5rem;padding:0;border:0;border-radius:9px;background:transparent;color:var(--c-muted);cursor:pointer;transform:translateY(-50%);}
.loginReveal[hidden] {display:none;}
.loginReveal:hover {color:var(--c-text);background:color-mix(in srgb, var(--c-accent) 10%, transparent);}
.loginReveal:focus-visible {outline:2px solid var(--c-accent);outline-offset:1px;}
.loginReveal-hide,.loginReveal[aria-pressed="true"] .loginReveal-show {display:none;}
.loginReveal[aria-pressed="true"] .loginReveal-hide {display:block;}
.loginReveal-label {position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap;}
.loginSubmit {min-height:3.1rem;margin-top:0.4rem;padding:0.8rem 1.25rem;border:0;border-radius:var(--radius);background:linear-gradient(135deg, #6a4bff 0%, #4426e0 55%, #b2348f 130%);color:#fff;font:inherit;font-weight:700;letter-spacing:0.01em;cursor:pointer;transition:filter 0.15s ease;}
.loginSubmit:hover {filter:brightness(1.08);}
.loginSubmit:focus-visible {outline:3px solid var(--c-focus);outline-offset:2px;}
.loginSubmit[aria-busy="true"] {cursor:progress;opacity:0.8;}
/* Other modules in the "login" position */
.loginPanel #section-box,.loginPanel .module-body {margin-top:1rem;}

/* --- Small screens: the gradient over the top half, the site's name and link above the card, the card in the middle --- */
@media (max-width:899px) {
    /* Equal rows above and below the card keep it in the middle; the site's name and link are centred above it */
    .loginLayout {position:relative;isolation:isolate;grid-template-columns:minmax(0, 1fr);grid-template-rows:1fr auto 1fr;min-height:100vh;min-height:100svh;overflow:hidden;}
    /* The panel's box is just the header now; its gradient is painted over the top half of the page */
    .loginBrand,.loginBrand--custom {position:static;justify-content:center;padding:1.25rem 1rem;overflow:visible;isolation:auto;background:none;text-align:center;}
    .loginBrand::before {display:none;}
    .loginBrand::after,.loginBrand--light::after {display:block;inset:0 0 50%;background:linear-gradient(180deg, rgba(14, 10, 50, 0.08) 0%, rgba(14, 10, 50, 0.3) 100%), radial-gradient(60% 55% at 12% 10%, #ff5f8f 0, transparent 70%), radial-gradient(55% 50% at 92% 18%, #ffb648 0, transparent 70%), radial-gradient(70% 60% at 78% 92%, #7a3cff 0, transparent 70%), radial-gradient(60% 55% at 6% 96%, #14c4e0 0, transparent 70%), var(--brand-bg);}
    .loginBrand--custom::after,.loginBrand--light::after {background:var(--brand-bg);}
    .loginBrand-inner {max-width:none;margin:0;}
    .loginBrand-site {font-size:clamp(1.4rem, 5.5vw, 1.9rem);}
    .loginBrand-host {display:none;}
    .loginBrand-visit {margin-top:0.85rem;padding:0.6rem 1.1rem;}
    .loginMain {padding:0 1rem;}
}

/* Two columns on tablets and small laptops: a tighter card in the narrow form column */
@media (min-width:900px) and (max-width:1199px) {
    .loginMain {padding-inline:1rem;}
    .loginPanel {padding:1.5rem;}
    .loginPanel-title {font-size:1.2rem;}
}

/* Narrow phones */
@media (max-width:420px) {
    .loginBrand,.loginBrand--custom {padding:1rem 0.75rem;}
    .loginMain {padding:0 0.75rem;}
    .loginPanel {padding:1.25rem;}
    .loginPanel-title {margin:1.1rem 0 1rem;font-size:1.15rem;}
    .loginForm {gap:0.9rem;}
}

/* Phones held sideways: the site's name and link in one row, so the card gets the height */
@media (max-width:899px) and (max-height:500px) and (orientation:landscape) {
    .loginBrand,.loginBrand--custom {padding:0.75rem 1rem 0.25rem;}
    .loginBrand-inner {display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:0.5rem 1.25rem;}
    .loginBrand-visit {margin-top:0;}
    .loginPanel {max-width:28rem;}
}

/* --- Right to left --- */
[dir="rtl"] .loginBrand-visit svg {transform:scaleX(-1);}
[dir="rtl"] .loginBrand-visit:hover svg,[dir="rtl"] .loginBrand-visit:focus-visible svg {transform:scaleX(-1) translateX(3px);}
[dir="rtl"] .loginPanel-logo img {object-position:right center;}
[dir="rtl"] .loginField-reveal input {padding-right:0.9rem;padding-left:3.25rem;}
[dir="rtl"] .loginReveal {right:auto;left:0.35rem;}
[dir="rtl"] .loginForm select {padding-right:0.9rem;padding-left:2.5rem;background-position:left 0.8rem center;}
[dir="rtl"] #system-message-container .alert {padding:0.85rem 1rem 0.85rem 2.5rem;}
[dir="rtl"] #system-message-container .close {right:auto;left:0.5rem;}

@media (prefers-reduced-motion:reduce) {
    .loginBrand::before {animation:none;}
    .loginBrand-visit,.loginBrand-visit svg,.loginSubmit {transition:none;}
}