/*
|--------------------------------------------------------------------------
| SpondonIt Installer — Modern CSS
|--------------------------------------------------------------------------
|
| Self-contained stylesheet for the install wizard, license revoke,
| and error pages. No external dependencies (Bootstrap, Tailwind, etc.).
| Uses CSS custom properties for easy theming.
|
*/

/* ── Fonts ────────────────────────────────────────────────────────────── */

@font-face {
    font-family: 'Poppins';
    src: url('../fonts/poppins/Poppins-Light.woff2') format('woff2'),
         url('../fonts/poppins/Poppins-Light.woff') format('woff');
    font-weight: 300;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Poppins';
    src: url('../fonts/poppins/Poppins-Regular.woff2') format('woff2'),
         url('../fonts/poppins/Poppins-Regular.woff') format('woff');
    font-weight: 400;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Poppins';
    src: url('../fonts/poppins/Poppins-Medium.woff2') format('woff2'),
         url('../fonts/poppins/Poppins-Medium.woff') format('woff');
    font-weight: 500;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'Poppins';
    src: url('../fonts/poppins/Poppins-SemiBold.woff2') format('woff2'),
         url('../fonts/poppins/Poppins-SemiBold.woff') format('woff');
    font-weight: 600;
    font-style: normal;
    font-display: swap;
}

/* ── Custom Properties ────────────────────────────────────────────────── */

:root {
    --color-primary: #4f46e5;
    --color-primary-hover: #4338ca;
    --color-primary-light: #eef2ff;
    --color-primary-ring: rgba(79, 70, 229, 0.3);

    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-danger-light: #fef2f2;
    --color-danger-ring: rgba(220, 38, 38, 0.3);

    --color-success: #16a34a;
    --color-success-light: #f0fdf4;

    --color-warning: #d97706;
    --color-warning-light: #fffbeb;

    --color-bg: #f1f5f9;
    --color-surface: #ffffff;
    --color-surface-alt: #f8fafc;
    --color-border: #e2e8f0;

    --color-text: #1e293b;
    --color-text-secondary: #64748b;
    --color-text-muted: #94a3b8;

    --color-header-from: #4f46e5;
    --color-header-to: #7c3aed;

    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.07), 0 2px 4px -2px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -4px rgba(0, 0, 0, 0.05);

    --radius: 8px;
    --radius-lg: 12px;

    --font: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

@media (prefers-color-scheme: dark) {
    :root {
        --color-primary: #818cf8;
        --color-primary-hover: #a5b4fc;
        --color-primary-light: rgba(99, 102, 241, 0.15);
        --color-primary-ring: rgba(129, 140, 248, 0.35);

        --color-danger: #f87171;
        --color-danger-hover: #fca5a5;
        --color-danger-light: rgba(248, 113, 113, 0.12);
        --color-danger-ring: rgba(248, 113, 113, 0.3);

        --color-success: #4ade80;
        --color-success-light: rgba(74, 222, 128, 0.1);

        --color-warning: #fbbf24;
        --color-warning-light: rgba(251, 191, 36, 0.1);

        --color-bg: #0f172a;
        --color-surface: #1e293b;
        --color-surface-alt: #1a2332;
        --color-border: #334155;

        --color-text: #f1f5f9;
        --color-text-secondary: #94a3b8;
        --color-text-muted: #64748b;

        --color-header-from: #3730a3;
        --color-header-to: #5b21b6;

        --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
        --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.25), 0 2px 4px -2px rgba(0, 0, 0, 0.15);
        --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    }
}

/* ── Reset & Base ─────────────────────────────────────────────────────── */

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

html {
    line-height: 1.6;
    -webkit-text-size-adjust: 100%;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font);
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-bg);
    min-height: 100vh;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-text);
}

h2 { font-size: 1.25rem; }
h3 { font-size: 1.1rem; }
h4 { font-size: 1rem; }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s;
}

a:hover {
    color: var(--color-primary-hover);
}

p { margin-bottom: 0.75rem; }
p:last-child { margin-bottom: 0; }

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: 1rem 0;
}

img { max-width: 100%; }

/* ── Layout ───────────────────────────────────────────────────────────── */

.installer-wrapper {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem 1rem;
}

.installer-container {
    width: 100%;
    max-width: 640px;
}

/* ── Card ─────────────────────────────────────────────────────────────── */

.card {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, var(--color-header-from), var(--color-header-to));
    padding: 1.75rem 2rem;
    text-align: center;
}

.card-header h2 {
    color: #ffffff;
    font-weight: 600;
    letter-spacing: 0.015em;
    margin: 0;
}

.card-header p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
    margin-top: 0.35rem;
}

.card-body {
    padding: 2rem;
}

/* ── Stepper / Progress ───────────────────────────────────────────────── */

.stepper {
    display: flex;
    list-style: none;
    padding: 0;
    margin: 0 0 2rem 0;
    counter-reset: step;
}

.stepper li {
    flex: 1;
    position: relative;
    text-align: center;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.stepper li::before {
    content: counter(step);
    counter-increment: step;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    margin: 0 auto 8px;
    border-radius: 50%;
    font-size: 0.8rem;
    font-weight: 600;
    background: var(--color-surface-alt);
    border: 2px solid var(--color-border);
    color: var(--color-text-muted);
    position: relative;
    z-index: 1;
    transition: all 0.3s ease;
}

.stepper li::after {
    content: '';
    position: absolute;
    top: 15px;
    left: calc(-50% + 16px);
    right: calc(50% + 16px);
    height: 2px;
    background: var(--color-border);
    z-index: 0;
    transition: background 0.3s ease;
}

.stepper li:first-child::after {
    display: none;
}

.stepper li.completed::before {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: #ffffff;
    /* Checkmark via SVG */
    content: '';
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='white'%3E%3Cpath fill-rule='evenodd' d='M16.707 5.293a1 1 0 010 1.414l-8 8a1 1 0 01-1.414 0l-4-4a1 1 0 011.414-1.414L8 12.586l7.293-7.293a1 1 0 011.414 0z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: center;
    background-size: 16px;
}

.stepper li.completed::after {
    background: var(--color-primary);
}

.stepper li.completed {
    color: var(--color-primary);
}

.stepper li.active::before {
    background: var(--color-surface);
    border-color: var(--color-primary);
    color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-ring);
}

.stepper li.active {
    color: var(--color-primary);
    font-weight: 600;
}

/* ── Forms ─────────────────────────────────────────────────────────────── */

.form-group {
    margin-bottom: 1.25rem;
}

.form-group:last-of-type {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 0.35rem;
}

label.required::after {
    content: ' *';
    color: var(--color-danger);
    font-weight: 600;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    font-family: var(--font);
    font-weight: 400;
    color: var(--color-text);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    -webkit-appearance: none;
}

.form-control:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-ring);
}

.form-control.has-error {
    border-color: var(--color-danger);
    box-shadow: 0 0 0 3px var(--color-danger-ring);
}

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

select.form-control {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='%2364748b'%3E%3Cpath fill-rule='evenodd' d='M5.293 7.293a1 1 0 011.414 0L10 10.586l3.293-3.293a1 1 0 111.414 1.414l-4 4a1 1 0 01-1.414 0l-4-4a1 1 0 010-1.414z' clip-rule='evenodd'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    background-size: 1.25rem;
    padding-right: 2.5rem;
}

.form-hint {
    display: block;
    font-size: 0.78rem;
    color: var(--color-text-muted);
    margin-top: 0.3rem;
}

.form-error {
    display: block;
    font-size: 0.78rem;
    color: var(--color-danger);
    margin-top: 0.3rem;
}

.form-error:empty {
    display: none;
}

/* ── Checkbox ──────────────────────────────────────────────────────────── */

.checkbox-wrapper {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--color-text);
    user-select: none;
}

.checkbox-wrapper input[type="checkbox"] {
    position: absolute;
    opacity: 0;
    width: 0;
    height: 0;
}

.checkbox-box {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-radius: 5px;
    background: var(--color-surface);
    flex-shrink: 0;
    transition: all 0.2s ease;
}

.checkbox-box svg {
    width: 12px;
    height: 12px;
    fill: none;
    stroke: #ffffff;
    stroke-width: 3;
    stroke-linecap: round;
    stroke-linejoin: round;
    opacity: 0;
    transform: scale(0.5);
    transition: all 0.15s ease;
}

.checkbox-wrapper input:checked + .checkbox-box {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.checkbox-wrapper input:checked + .checkbox-box svg {
    opacity: 1;
    transform: scale(1);
}

.checkbox-wrapper input:focus-visible + .checkbox-box {
    box-shadow: 0 0 0 3px var(--color-primary-ring);
}

/* ── Buttons ──────────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.5rem;
    font-family: var(--font);
    font-size: 0.85rem;
    font-weight: 500;
    letter-spacing: 0.02em;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s ease;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
}

.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-hover);
    box-shadow: 0 4px 12px var(--color-primary-ring);
    color: #ffffff;
}

.btn-danger {
    background: var(--color-danger);
    color: #ffffff;
}

.btn-danger:hover:not(:disabled) {
    background: var(--color-danger-hover);
    box-shadow: 0 4px 12px var(--color-danger-ring);
    color: #ffffff;
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border: 1px solid var(--color-border);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-surface-alt);
    color: var(--color-text);
    border-color: var(--color-text-muted);
}

.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.78rem;
}

.btn-block {
    display: flex;
    width: 100%;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-primary);
    padding: 0;
    font-size: inherit;
    cursor: pointer;
    text-decoration: underline;
}

.btn-link:hover {
    color: var(--color-primary-hover);
}

.btn-link.text-danger {
    color: var(--color-danger);
}

.btn-link.text-danger:hover {
    color: var(--color-danger-hover);
}

/* ── Alerts ───────────────────────────────────────────────────────────── */

.alert {
    display: flex;
    align-items: flex-start;
    gap: 0.6rem;
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    line-height: 1.5;
}

.alert-icon {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    margin-top: 1px;
}

.alert-success {
    background: var(--color-success-light);
    color: var(--color-success);
    border: 1px solid var(--color-success);
    border-left-width: 3px;
}

.alert-danger {
    background: var(--color-danger-light);
    color: var(--color-danger);
    border: 1px solid var(--color-danger);
    border-left-width: 3px;
}

.alert-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
    border: 1px solid var(--color-warning);
    border-left-width: 3px;
}

/* ── Requirement Check Items ──────────────────────────────────────────── */

.check-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.6rem;
}

@media (max-width: 600px) {
    .check-grid {
        grid-template-columns: 1fr;
    }
}

.check-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.82rem;
    font-weight: 400;
}

.check-item.pass {
    background: var(--color-success-light);
    color: var(--color-success);
}

.check-item.fail {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.check-item .check-icon {
    flex-shrink: 0;
    width: 16px;
    height: 16px;
}

/* ── Section Title ────────────────────────────────────────────────────── */

.section-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--color-border);
}

/* ── Button Group (form actions) ──────────────────────────────────────── */

.form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    margin-top: 1.75rem;
}

.form-actions-center {
    justify-content: center;
}

.form-actions-end {
    justify-content: flex-end;
}

/* ── Credential Card (done page) ──────────────────────────────────────── */

.credential-card {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin: 1.25rem 0;
}

.credential-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.4rem 0;
}

.credential-row + .credential-row {
    border-top: 1px solid var(--color-border);
}

.credential-label {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.credential-value {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text);
    font-family: ui-monospace, 'Cascadia Code', 'Fira Code', monospace;
}

.credential-masked {
    letter-spacing: 2px;
    color: var(--color-text-muted);
}

.btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.3rem 0.6rem;
    font-size: 0.75rem;
    font-weight: 500;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: 5px;
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.15s ease;
}

.btn-copy:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.btn-copy svg {
    width: 14px;
    height: 14px;
}

.btn-copy.copied {
    border-color: var(--color-success);
    color: var(--color-success);
}

/* ── Toast Notifications ──────────────────────────────────────────────── */

.toast-container {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    z-index: 100000;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    pointer-events: none;
}

.toast {
    pointer-events: auto;
    display: flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius);
    font-size: 0.85rem;
    font-weight: 500;
    color: #ffffff;
    box-shadow: var(--shadow-lg);
    animation: toastIn 0.3s ease forwards;
    max-width: 380px;
}

.toast.removing {
    animation: toastOut 0.25s ease forwards;
}

.toast-success { background: var(--color-success); }
.toast-error   { background: var(--color-danger); }
.toast-warning { background: var(--color-warning); }

.toast svg {
    flex-shrink: 0;
    width: 18px;
    height: 18px;
    fill: currentColor;
}

@keyframes toastIn {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
    from { opacity: 1; transform: translateX(0); }
    to   { opacity: 0; transform: translateX(20px); }
}

/* ── Spinner / Preloader ──────────────────────────────────────────────── */

.preloader {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 1rem;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(4px);
    z-index: 100001;
}

@media (prefers-color-scheme: dark) {
    .preloader {
        background: rgba(15, 23, 42, 0.85);
    }
}

.preloader.active {
    display: flex;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
    border-color: rgba(255,255,255,0.35);
    border-top-color: #ffffff;
}

.preloader-text {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    text-align: center;
    max-width: 320px;
    line-height: 1.5;
}

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

/* ── Modal (vanilla JS) ──────────────────────────────────────────────── */

.modal-overlay {
    position: fixed;
    inset: 0;
    display: none;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
    z-index: 99999;
    padding: 1rem;
}

.modal-overlay.active {
    display: flex;
}

.modal-box {
    background: var(--color-surface);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 440px;
    animation: modalIn 0.2s ease;
    overflow: hidden;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: 1rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--color-text-muted);
    padding: 0.25rem;
    border-radius: 4px;
    display: flex;
    transition: color 0.15s;
}

.modal-close:hover {
    color: var(--color-text);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-body {
    padding: 1.25rem 1.5rem;
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--color-border);
}

@keyframes modalIn {
    from { opacity: 0; transform: scale(0.95) translateY(-10px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

/* ── Success / Hero sections ──────────────────────────────────────────── */

.hero-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 64px;
    height: 64px;
    margin: 0 auto 1rem;
    border-radius: 50%;
}

.hero-icon.success {
    background: var(--color-success-light);
    color: var(--color-success);
}

.hero-icon.error {
    background: var(--color-danger-light);
    color: var(--color-danger);
}

.hero-icon svg {
    width: 32px;
    height: 32px;
}

/* ── Utility ──────────────────────────────────────────────────────────── */

.text-center { text-align: center; }
.text-danger { color: var(--color-danger); }
.text-success { color: var(--color-success); }
.text-muted { color: var(--color-text-muted); }
.text-secondary { color: var(--color-text-secondary); }
.text-sm { font-size: 0.82rem; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.mt-1  { margin-top: 0.5rem; }
.mt-2  { margin-top: 1rem; }
.mt-3  { margin-top: 1.5rem; }
.mb-1  { margin-bottom: 0.5rem; }
.mb-2  { margin-bottom: 1rem; }
.mb-3  { margin-bottom: 1.5rem; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.hidden { display: none !important; }
.d-flex { display: flex; }
.items-center { align-items: center; }

/* ── Responsive ───────────────────────────────────────────────────────── */

@media (max-width: 480px) {
    .card-body {
        padding: 1.25rem;
    }

    .card-header {
        padding: 1.25rem 1.5rem;
    }

    .stepper li {
        font-size: 0;
    }

    .stepper li.active {
        font-size: 0.65rem;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn {
        width: 100%;
    }
}