/* =========================================================
   JEROME UNIQUE ENGINEERING LIMITED (RC 1553331)
   Core Industrial Website Styles (Metalock-Inspired)
   File: assets/css/style.css
   ========================================================= */

/* 1. Design Tokens & Industrial Color Palette */

:root {
    --color-primary: #081627;          /* Deep marine industrial navy */
    --color-primary-dark: #040c16;     /* Deepest core background */
    --color-primary-light: #132b47;    /* Secondary interactive state */

    --color-accent: #0284c7;           /* High-precision steel blue */
    --color-accent-dark: #0369a1;      /* Deep accent shade */
    --color-warning: #f59e0b;          /* Industrial safety amber */

    --color-white: #ffffff;
    --color-background: #f1f5f9;       /* Crisp industrial light gray */
    --color-surface: #ffffff;          /* Card background */

    --color-text: #1e293b;             /* Charcoal body text */
    --color-text-muted: #64748b;       /* Secondary text */
    --color-border: #cbd5e1;           /* Metallic border definition */

    --color-success: #15803d;
    --color-error: #b91c1c;

    --font-body: Arial, Helvetica, sans-serif;

    --container-width: 1200px;

    --radius-small: 4px;
    --radius-medium: 8px;
    --radius-large: 16px;

    --shadow-small: 0 4px 6px -1px rgba(8, 22, 39, 0.08), 0 2px 4px -2px rgba(8, 22, 39, 0.04);
    --shadow-medium: 0 10px 25px -3px rgba(8, 22, 39, 0.12), 0 4px 6px -4px rgba(8, 22, 39, 0.08);

    --transition-fast: 180ms ease;
    --transition-normal: 280ms ease;
}


/* 2. Reset and Base Styles */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

img,
picture,
video {
    display: block;
    max-width: 100%;
}

img {
    height: auto;
}

button,
input,
select,
textarea {
    font: inherit;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--color-accent-dark);
    text-decoration: none;
    transition:
        color var(--transition-fast),
        background-color var(--transition-fast);
}

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

button {
    cursor: pointer;
}

button:disabled {
    cursor: not-allowed;
    opacity: 0.65;
}

ul,
ol {
    padding-left: 1.4rem;
}

p {
    margin-top: 0;
    margin-bottom: 1rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    margin-top: 0;
    margin-bottom: 1rem;
    color: var(--color-primary);
    line-height: 1.25;
    font-weight: 700;
}

h1 {
    font-size: clamp(2.2rem, 5vw, 3.8rem);
}

h2 {
    font-size: clamp(1.7rem, 3vw, 2.5rem);
}

h3 {
    font-size: clamp(1.2rem, 2vw, 1.45rem);
}

:focus-visible {
    outline: 3px solid var(--color-accent);
    outline-offset: 3px;
}


/* 3. Shared Layout & Industrial Hero Sections */

.container {
    width: min(
        var(--container-width),
        calc(100% - 40px)
    );
    margin-inline: auto;
}

.section {
    padding-block: 80px;
}

.section--light {
    background: var(--color-background);
}

.section--dark {
    background: var(--color-primary-dark);
    color: var(--color-white);
}

.section--dark h1,
.section--dark h2,
.section--dark h3,
.section--dark h4 {
    color: var(--color-white);
}

.section-heading {
    max-width: 760px;
    margin: 0 auto 42px;
    text-align: center;
}

.section-heading p {
    color: var(--color-text-muted);
}

.section--dark .section-heading p {
    color: #cbd5e1;
}

.eyebrow {
    display: inline-block;
    margin-bottom: 12px;
    padding: 4px 10px;
    background: rgba(2, 132, 199, 0.1);
    color: var(--color-accent-dark);
    font-size: 0.78rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    border-radius: var(--radius-small);
    border-left: 3px solid var(--color-accent);
}

/* Metalock-style Page Hero */
.page-hero {
    position: relative;
    padding: 100px 0;
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    color: var(--color-white);
    text-align: left;
    border-bottom: 4px solid var(--color-accent);
}

.page-hero h1,
.page-hero p {
    color: var(--color-white);
}

.page-hero .eyebrow {
    background: rgba(255, 255, 255, 0.15);
    color: var(--color-white);
    border-left-color: var(--color-warning);
}

.hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 28px;
}


/* 4. Utility Classes */

.text-center {
    text-align: center;
}

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

.bg-light {
    background: var(--color-background);
}

.mt-0 {
    margin-top: 0;
}

.mb-0 {
    margin-bottom: 0;
}

.hidden {
    display: none !important;
}


/* 5. Industrial Buttons */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;

    min-height: 48px;
    padding: 12px 26px;

    border: 2px solid transparent;
    border-radius: var(--radius-small);

    font-weight: 700;
    text-align: center;
    line-height: 1.4;

    transition:
        transform var(--transition-fast),
        background-color var(--transition-fast),
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

.btn:hover {
    transform: translateY(-2px);
}

.btn:active {
    transform: translateY(0);
}

.btn-primary,
.btn--primary {
    color: var(--color-white);
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-primary:hover,
.btn--primary:hover {
    color: var(--color-white);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.btn--accent {
    color: var(--color-white);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.btn--accent:hover {
    color: var(--color-white);
    background: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.btn-outline,
.btn--outline {
    color: var(--color-primary);
    background: transparent;
    border-color: var(--color-primary);
}

.btn-outline:hover,
.btn--outline:hover {
    color: var(--color-white);
    background: var(--color-primary);
}

.btn--white {
    color: var(--color-primary);
    background: var(--color-white);
    border-color: var(--color-white);
}

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

.btn-group {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 14px;
}


/* 6. Cards, Grids & Image Slots (Metalock Style) */

.grid {
    display: grid;
    gap: 30px;
}

.grid--2 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.grid--3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid--4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.card {
    position: relative;
    min-width: 0;
    padding: 32px;

    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-top: 4px solid var(--color-primary);
    border-radius: var(--radius-medium);

    box-shadow: var(--shadow-small);

    transition:
        transform var(--transition-normal),
        box-shadow var(--transition-normal),
        border-color var(--transition-normal);
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
    border-top-color: var(--color-accent);
}

.card-image-slot {
    margin: -32px -32px 24px -32px;
    overflow: hidden;
    border-top-left-radius: var(--radius-medium);
    border-top-right-radius: var(--radius-medium);
    background: var(--color-primary);
    aspect-ratio: 16 / 10;
}

.card-image-slot img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-normal);
}

.card:hover .card-image-slot img {
    transform: scale(1.04);
}

.card__title,
.card h3 {
    margin-bottom: 12px;
}

.card__text,
.card p {
    margin-bottom: 0;
    color: var(--color-text-muted);
}


/* 7. Feature Lists & Technical Specs */

.feature-list {
    list-style: none;
    padding: 0;
    margin: 20px 0;
}

.feature-list li {
    position: relative;
    padding-left: 28px;
    margin-bottom: 12px;
    color: var(--color-text);
}

.feature-list li::before {
    content: "■";
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 0.85rem;
    top: 2px;
}


/* 8. Forms & Inputs */

.form {
    display: grid;
    gap: 20px;
}

.form-group {
    display: grid;
    gap: 8px;
}

.form-label {
    color: var(--color-primary);
    font-weight: 700;
    font-size: 0.95rem;
}

.form-control {
    display: block;
    width: 100%;
    min-height: 50px;
    padding: 12px 16px;

    color: var(--color-text);
    background: var(--color-white);

    border: 1px solid var(--color-border);
    border-radius: var(--radius-small);

    transition:
        border-color var(--transition-fast),
        box-shadow var(--transition-fast);
}

textarea.form-control {
    min-height: 160px;
    resize: vertical;
}

.form-control:focus {
    border-color: var(--color-accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(2, 132, 199, 0.15);
}

.form-control.is-invalid,
.form-control[aria-invalid="true"] {
    border-color: var(--color-error);
}


/* 9. Status and Notifications */

.notice {
    padding: 1rem 1.25rem;
    margin: 1.25rem 0;
    border: 1px solid transparent;
    border-radius: var(--radius-small);
    line-height: 1.6;
}

.notice h2 {
    margin-top: 0;
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.notice p {
    margin-bottom: 0;
}

.notice--success,
.form-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
    font-weight: 700;
}

.notice--error,
.form-error {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}


/* 10. Call to Action (Metalock Banner) */

.cta {
    padding: 54px;
    color: var(--color-white);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 100%);
    border-radius: var(--radius-large);
    border-left: 6px solid var(--color-accent);
    box-shadow: var(--shadow-medium);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 30px;
}

.cta h2,
.cta h3 {
    color: var(--color-white);
    margin-bottom: 8px;
}

.cta p {
    color: #cbd5e1;
    margin-bottom: 0;
}


/* 11. Accessibility */

.skip-link {
    position: absolute;
    top: -100px;
    left: 16px;
    z-index: 9999;

    padding: 12px 18px;
    color: var(--color-white);
    background: var(--color-primary);
    border-radius: var(--radius-small);
}

.skip-link:focus {
    top: 16px;
}


/* 12. Responsive Defaults */

@media (max-width: 900px) {
    .grid--4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .grid--3 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .section {
        padding-block: 64px;
    }

    .cta {
        padding: 36px 28px;
    }
}

@media (max-width: 600px) {
    .container {
        width: min(
            var(--container-width),
            calc(100% - 32px)
        );
    }

    .section {
        padding-block: 48px;
    }

    .grid--2,
    .grid--3,
    .grid--4 {
        grid-template-columns: minmax(0, 1fr);
    }

    .card {
        padding: 24px;
    }

    .card-image-slot {
        margin: -24px -24px 20px -24px;
    }

    .cta {
        padding: 28px 20px;
        flex-direction: column;
        align-items: stretch;
    }

    .btn-group {
        align-items: stretch;
        flex-direction: column;
    }

    .btn-group .btn {
        width: 100%;
    }
}