/* -------------------------------------------------------------------------- */
/* Certificate Portal — theme & base                                           */
/* -------------------------------------------------------------------------- */

:root {
    --color-primary: #0d5c63;
    --color-primary-hover: #0a4a50;
    --color-accent: #c95454;
    --color-accent-hover: #b54747;
    --color-bg: #ffffff;
    --color-surface: #f0f5f5;
    --color-text: #1a2e2f;
    --color-muted: #5c6e70;
    --color-error: #b91c1c;
    --shadow-sm: 0 2px 10px rgba(13, 92, 99, 0.08);
    --shadow-md: 0 10px 40px rgba(13, 92, 99, 0.1);
    --radius-lg: 16px;
    --radius-pill: 999px;
    --transition: 0.2s ease;
    --font-heading: "Poppins", system-ui, sans-serif;
    --font-body: "Poppins", system-ui, sans-serif;
    --font-cert: "Playfair Display", Georgia, serif;
}

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

html {
    -webkit-font-smoothing: antialiased;
}

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.5;
    color: var(--color-text);
    background: var(--color-bg);
    background-image: linear-gradient(180deg, var(--color-bg) 0%, var(--color-surface) 45%, var(--color-bg) 100%);
    position: relative;
    overflow-x: hidden;
}

body::before,
body::after {
    content: "";
    position: fixed;
    pointer-events: none;
    z-index: 0;
    filter: blur(70px);
    opacity: 0.25;
    will-change: transform;
}

body::before {
    width: 520px;
    height: 520px;
    top: -180px;
    left: -200px;
    background: radial-gradient(circle at center, rgba(13, 92, 99, 0.35), rgba(13, 92, 99, 0) 60%);
    animation: floatTeal 22s ease-in-out infinite;
}

body::after {
    width: 520px;
    height: 520px;
    bottom: -200px;
    right: -200px;
    background: radial-gradient(circle at center, rgba(201, 84, 84, 0.30), rgba(201, 84, 84, 0) 60%);
    animation: floatRed 26s ease-in-out infinite;
}

@keyframes floatTeal {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: 0.22;
    }
    50% {
        transform: translate3d(30px, 22px, 0) scale(1.04);
        opacity: 0.28;
    }
    100% {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: 0.22;
    }
}

@keyframes floatRed {
    0% {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: 0.20;
    }
    50% {
        transform: translate3d(-28px, -18px, 0) scale(1.05);
        opacity: 0.26;
    }
    100% {
        transform: translate3d(0, 0, 0) scale(1);
        opacity: 0.20;
    }
}

@media (prefers-reduced-motion: reduce) {
    body::before,
    body::after {
        animation: none;
    }
}

.page {
    max-width: 960px;
    margin: 0 auto;
    padding: 1.75rem 1.25rem 3rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    min-height: 100vh;
    position: relative;
    z-index: 1;
}

/* -------------------------------------------------------------------------- */
/* Header                                                                      */
/* -------------------------------------------------------------------------- */

.header {
    text-align: center;
    margin-bottom: 1.75rem;
}

.header__logo {
    display: block;
    margin: 0 auto 1.1rem;
    height: clamp(70px, 22vw, 100px);
    width: auto;
    max-width: 100%;
    object-fit: contain;
}

.header__title {
    margin: 0;
    font-family: var(--font-heading);
    font-size: clamp(1.5rem, 4vw, 1.875rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

/* -------------------------------------------------------------------------- */
/* Main layout                                                                 */
/* -------------------------------------------------------------------------- */

.main {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    flex: 1;
}

/* -------------------------------------------------------------------------- */
/* Input section                                                               */
/* -------------------------------------------------------------------------- */

.input-section {
    width: 100%;
    display: flex;
    justify-content: center;
}

.input-section__inner {
    width: 100%;
    max-width: 520px;
    padding: 1.75rem 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(13, 92, 99, 0.06);
}

.input-stack {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.input-stack .input-field {
    flex: none;
    width: 100%;
    max-width: 380px;
}

.input-stack .btn {
    width: 100%;
    max-width: 280px;
}

.input-row {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    justify-content: center;
    align-items: stretch;
}

.input-field {
    flex: 1 1 200px;
    min-width: 0;
    padding: 0.75rem 1.25rem;
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid rgba(13, 92, 99, 0.12);
    border-radius: var(--radius-pill);
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

.input-field::placeholder {
    color: var(--color-muted);
}

.input-field:hover {
    border-color: rgba(13, 92, 99, 0.22);
}

.input-field:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(13, 92, 99, 0.15);
    background: var(--color-bg);
}

/* -------------------------------------------------------------------------- */
/* Buttons                                                                     */
/* -------------------------------------------------------------------------- */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-pill);
    cursor: pointer;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
}

.btn--primary {
    background: var(--color-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(13, 92, 99, 0.25);
}

.btn--primary:hover {
    background: var(--color-primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(13, 92, 99, 0.3);
}

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

.btn--accent {
    background: var(--color-accent);
    color: #fff;
    box-shadow: 0 2px 8px rgba(201, 84, 84, 0.25);
}

.btn--accent:hover {
    background: var(--color-accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(201, 84, 84, 0.35);
}

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

/* -------------------------------------------------------------------------- */
/* Messages                                                                    */
/* -------------------------------------------------------------------------- */

.message {
    margin: 1rem 0 0;
    min-height: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    font-weight: 500;
}

.message--error {
    color: var(--color-error);
}

.message--info {
    color: var(--color-muted);
}

/* -------------------------------------------------------------------------- */
/* Access modal                                                                */
/* -------------------------------------------------------------------------- */

.modal-overlay {
    position: fixed;
    inset: 0;
    z-index: 30;
    display: none;
    align-items: center;
    justify-content: center;
    padding: 1.25rem;
    background: rgba(14, 28, 30, 0.25);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    opacity: 0;
    transition: opacity 0.25s ease;
}

.modal-overlay[hidden] {
    display: none !important;
}

.modal-overlay.is-open {
    display: flex;
    opacity: 1;
}

.modal-card {
    width: min(100%, 560px);
    background: #fff;
    border-radius: 18px;
    box-shadow: 0 22px 56px rgba(9, 31, 34, 0.22);
    border: 1px solid rgba(13, 92, 99, 0.08);
    padding: 1.5rem 1.5rem 1.25rem;
    text-align: center;
    animation: modalIn 0.25s ease;
}

.modal-title {
    margin: 0 0 0.65rem;
    font-family: var(--font-heading);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text);
}

.modal-message {
    margin: 0 0 1.25rem;
    color: var(--color-muted);
    font-size: 0.98rem;
    line-height: 1.55;
}

.btn--modal-ok {
    min-width: 120px;
    background: #bd4257;
    color: #fff;
    box-shadow: 0 2px 10px rgba(189, 66, 87, 0.35);
}

.btn--modal-ok:hover {
    background: #a3384d;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(189, 66, 87, 0.4);
}

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

/* Success modal OK only — dark teal */
.btn--modal-ok-success {
    min-width: 120px;
    background: #003d4f;
    color: #fff;
    box-shadow: 0 2px 10px rgba(0, 61, 79, 0.35);
}

.btn--modal-ok-success:hover {
    background: #005266;
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 61, 79, 0.45);
}

.btn--modal-ok-success:active {
    transform: translateY(0);
}

.modal-card--success {
    border-color: rgba(13, 92, 99, 0.14);
    background: linear-gradient(180deg, #ffffff 0%, #f7fbfa 100%);
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: translateY(8px) scale(0.985);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* -------------------------------------------------------------------------- */
/* Certificate section & card                                                  */
/* -------------------------------------------------------------------------- */

.certificate-section {
    width: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.certificate-section[hidden] {
    display: none !important;
}

.certificate-card {
    width: 100%;
    max-width: 820px;
    padding: 1.5rem;
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(13, 92, 99, 0.06);
}

/* -------------------------------------------------------------------------- */
/* Certificate preview — same geometry as original inline styles               */
/* -------------------------------------------------------------------------- */

.certificate-preview {
    display: none;
    position: relative;
    width: 794px;
    margin: 0 auto;
}

#result {
    width: 794px;
    margin: 0 auto;
    position: relative;
}

.certificate-preview__image {
    display: block;
    width: 794px;
    height: auto;
}

.certificate-preview__name {
    position: absolute;
    top: 395px;
    width: 100%;
    text-align: center;
    font-size: 28px;
    font-family: var(--font-cert);
    font-weight: 600;
}

.certificate-preview__course {
    position: absolute;
    top: 582px;
    width: 100%;
    text-align: center;
    font-size: 24px;
    font-weight: 600;
    font-family: var(--font-body);
}

.certificate-preview__dates {
    position: absolute;
    top: 642px;
    left: 68%;
    text-align: left;
    font-size: 20px;
    font-weight: 700;
    font-family: var(--font-body);
}

/* -------------------------------------------------------------------------- */
/* Responsive                                                                  */
/* -------------------------------------------------------------------------- */

@media (max-width: 640px) {
    .input-section__inner {
        padding: 1.5rem 1.25rem;
    }

    .certificate-card {
        padding: 1rem;
    }
}