/* =========================================================
   shared-content.css
   Shared styles for Projects, Embedded, Tutorial,
   Programming, Articles pages
   ========================================================= */

/* ----------  CSS variables (extend from header.css)  ---------- */
:root {
    --clr-bg:         #7a92b0;
    --clr-panel:      #c4d5eb;
    --clr-panel-dark: #a8bfd8;
    --clr-navy:       #020e38;
    --clr-blue:       #1a6fc4;
    --clr-blue-light: #3498db;
    --clr-accent:     #00c6ff;
    --clr-white:      #ffffff;
    --clr-text:       #0d1f3c;
    --clr-text-muted: #4a5568;
    --radius-sm:      6px;
    --radius-md:      10px;
    --shadow-box:     0 4px 18px rgba(2, 14, 56, 0.13);
    --shadow-active:  0 6px 22px rgba(26, 111, 196, 0.38);
    --transition:     0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.section-heading {
    font-family: 'Exo 2', sans-serif;
    font-weight: 900;
    color: var(--clr-navy);
    letter-spacing: -0.01em;
    text-align: center;
    margin: 0 0 0.6rem 0;
    padding: 0.5rem 1rem;
    position: relative;
    display: inline-block;
}
.section-heading::after {
    content: '';
    display: block;
    width: 60%;
    height: 3px;
    background: linear-gradient(90deg, var(--clr-blue), var(--clr-accent));
    border-radius: 2px;
    margin: 6px auto 0;
}

/* =========================================================
   SELECTION BOX — improved cards
   ========================================================= */
.project-box,
.Embedded-box,
.Tutorial-box,
.Programming-box,
.Articles-box {
    transition: background-color var(--transition),
                color var(--transition),
                transform 0.22s cubic-bezier(0.34, 1.56, 0.64, 1),
                box-shadow var(--transition),
                border-color var(--transition);
    cursor: pointer;
    font-family: 'Exo 2', sans-serif;
    border: 2px solid var(--clr-navy) !important;
    border-radius: var(--radius-md) !important;
    background: linear-gradient(145deg, #d4e4f5, #c4d5eb) !important;
    box-shadow: var(--shadow-box);
    position: relative;
    overflow: hidden;
}

/* Shimmer line at top of each box */
.project-box::before,
.Embedded-box::before,
.Tutorial-box::before,
.Programming-box::before,
.Articles-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--clr-blue), var(--clr-accent), var(--clr-blue));
    background-size: 200% 100%;
    opacity: 0;
    transition: opacity var(--transition);
}

.project-box:hover::before,
.Embedded-box:hover::before,
.Tutorial-box:hover::before,
.Programming-box:hover::before,
.Articles-box:hover::before {
    opacity: 1;
    animation: shimmer 1.8s linear infinite;
}

@keyframes shimmer {
    0%   { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.project-box:hover,
.Embedded-box:hover,
.Tutorial-box:hover,
.Programming-box:hover,
.Articles-box:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 8px 24px rgba(26, 111, 196, 0.28);
    background: linear-gradient(145deg, #ddeeff, #c8d9ed) !important;
    border-color: var(--clr-blue) !important;
}

.project-box.active,
.Embedded-box.active,
.Tutorial-box.active,
.Programming-box.active,
.Articles-box.active {
    background: linear-gradient(135deg, var(--clr-blue) 0%, #0f4fa8 100%) !important;
    color: var(--clr-white) !important;
    border-color: var(--clr-blue) !important;
    box-shadow: var(--shadow-active);
    transform: translateY(-2px);
}

.project-box.active::before,
.Embedded-box.active::before,
.Tutorial-box.active::before,
.Programming-box.active::before,
.Articles-box.active::before {
    opacity: 1;
}

/* Box heading text */
.project-box h2,
.Embedded-box h2,
.Tutorial-box h2,
.Programming-box h2,
.Articles-box h2 {
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    color: var(--clr-text);
    margin: 0;
    transition: color var(--transition);
}

.project-box.active h2,
.Embedded-box.active h2,
.Tutorial-box.active h2,
.Programming-box.active h2,
.Articles-box.active h2 {
    color: var(--clr-white);
}

/* =========================================================
   CONTENT PANEL — modal / display area
   ========================================================= */
.project-modal,
.Embedded-modal,
.Tutorial-modal,
.Programming-modal,
.Articles-modal {
    background: linear-gradient(160deg, #d8e8f8 0%, #c4d5eb 100%) !important;
    border: 2px solid var(--clr-navy) !important;
    border-radius: 14px !important;
    box-shadow: 0 8px 32px rgba(2, 14, 56, 0.16) !important;
    position: relative;
    overflow: hidden;
}

/* Accent bar on left edge of content panel */
.project-modal.active::before,
.Embedded-modal.active::before,
.Tutorial-modal.active::before,
.Programming-modal.active::before,
.Articles-modal.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 5px;
    background: linear-gradient(180deg, var(--clr-blue), var(--clr-accent));
    border-radius: 14px 0 0 14px;
}

/* Content headings */
.project-modal h2,
.Embedded-modal h2,
.Tutorial-modal h2,
.Programming-modal h2,
.Articles-modal h2 {
    color: var(--clr-navy);
    font-family: 'Exo 2', sans-serif;
    font-weight: 900;
    border-bottom: 2px solid rgba(2, 14, 56, 0.12);
    padding-bottom: 0.4rem;
    margin-bottom: 0.8rem;
}

.project-modal h3,
.Embedded-modal h3,
.Tutorial-modal h3,
.Programming-modal h3,
.Articles-modal h3 {
    color: var(--clr-blue);
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
}

.project-modal h4,
.Embedded-modal h4,
.Tutorial-modal h4,
.Programming-modal h4,
.Articles-modal h4 {
    color: var(--clr-navy);
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
}

.project-modal p,
.Embedded-modal p,
.Tutorial-modal p,
.Programming-modal p,
.Articles-modal p {
    color: var(--clr-text);
    font-family: 'Exo 2', sans-serif;
    line-height: 1.75;
}

/* hr dividers inside panels */
.project-modal hr,
.Embedded-modal hr,
.Tutorial-modal hr,
.Programming-modal hr,
.Articles-modal hr {
    border: none;
    border-top: 2px solid rgba(2, 14, 56, 0.1);
    margin: 1.2rem 0;
}

/* =========================================================
   CONTENT PANEL ANIMATIONS
   ========================================================= */
@keyframes contentFadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

.project-modal.active,
.Embedded-modal.active,
.Tutorial-modal.active,
.Programming-modal.active,
.Articles-modal.active {
    animation: contentFadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1) both;
}

/* =========================================================
   FOOTER PANEL
   ========================================================= */
@keyframes panelSlideIn {
    from { opacity: 0; transform: translateX(20px); }
    to   { opacity: 1; transform: translateX(0); }
}
.aboutus-modal.active {
    animation: panelSlideIn 0.3s ease both;
}

.aboutus-box {
    transition: background-color var(--transition), transform var(--transition);
}
.aboutus_box_title {
    transition: background-color var(--transition), color var(--transition), padding-left var(--transition);
    cursor: pointer;
}
.aboutus_box_title:hover {
    padding-left: calc(1vw + 6px) !important;
}

/* =========================================================
   CLOSE BUTTON
   ========================================================= */
.close_button_class {
    background: linear-gradient(135deg, #c0392b, #922b21);
    color: var(--clr-white);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    width: auto;
    margin: 0 0 6px 0;
    padding: 5px 14px;
    font-family: 'Exo 2', sans-serif;
    font-weight: 700;
    font-size: 0.85rem;
    transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
    float: right;
    box-shadow: 0 2px 8px rgba(192, 57, 43, 0.3);
    letter-spacing: 0.03em;
}
.close_button_class:hover {
    background: linear-gradient(135deg, #e74c3c, #c0392b);
    transform: scale(1.05);
    box-shadow: 0 4px 14px rgba(192, 57, 43, 0.45);
}
.close_button_class:active {
    transform: scale(0.97);
}

/* =========================================================
   LOADING STATE — spinner
   ========================================================= */
.project-loading,
.embedded-loading,
.tutorial-loading,
.programming-loading,
.articles-loading {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--clr-text-muted);
    font-size: 1rem;
    font-family: 'Exo 2', sans-serif;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.project-loading::after,
.embedded-loading::after,
.tutorial-loading::after,
.programming-loading::after,
.articles-loading::after {
    content: '';
    display: block;
    width: 36px;
    height: 36px;
    border: 3px solid rgba(2, 14, 56, 0.12);
    border-top-color: var(--clr-blue);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}
@keyframes spin {
    to { transform: rotate(360deg); }
}

/* =========================================================
   TOUCH DEVICE OVERRIDES
   ========================================================= */
@media (hover: none) {
    .project-box:hover,
    .Embedded-box:hover,
    .Tutorial-box:hover,
    .Programming-box:hover,
    .Articles-box:hover {
        transform: none;
        box-shadow: var(--shadow-box);
        background: linear-gradient(145deg, #d4e4f5, #c4d5eb) !important;
        border-color: var(--clr-navy) !important;
    }
    .close_button_class:hover {
        transform: none;
    }
    .aboutus_box_title:hover {
        padding-left: inherit !important;
    }
}

/* =========================================================
   MOBILE  (max-width: 480px)
   ========================================================= */
@media (max-width: 480px) {

    .project-modal p,
    .Embedded-modal p,
    .Tutorial-modal p,
    .Programming-modal p,
    .Articles-modal p {
        font-size: 3.8vw;
        line-height: 1.7;
    }

    .project-modal h2,
    .Embedded-modal h2,
    .Tutorial-modal h2,
    .Programming-modal h2,
    .Articles-modal h2 {
        font-size: 5.5vw;
        margin-top: 0;
    }

    .project-modal h3,
    .Embedded-modal h3,
    .Tutorial-modal h3,
    .Programming-modal h3,
    .Articles-modal h3 {
        font-size: 4.5vw;
    }

    .project-modal h4,
    .Embedded-modal h4,
    .Tutorial-modal h4,
    .Programming-modal h4,
    .Articles-modal h4 {
        font-size: 4vw;
    }

    .project-box h2,
    .Embedded-box h2,
    .Tutorial-box h2,
    .Programming-box h2,
    .Articles-box h2 {
        font-size: 3.8vw;
        margin: 0;
    }

    .project-details,
    .Embedded-details,
    .Tutorial-details,
    .Programming-details,
    .Articles-details {
        padding-right: 0;
    }

    /* Tap feedback */
    .project-box:active,
    .Embedded-box:active,
    .Tutorial-box:active,
    .Programming-box:active,
    .Articles-box:active {
        transform: scale(0.96);
        background: linear-gradient(145deg, #bdd4ea, #aac5db) !important;
    }

    @keyframes boxPulse {
        0%   { box-shadow: 0 0 0 0 rgba(26, 111, 196, 0.5); }
        70%  { box-shadow: 0 0 0 10px rgba(26, 111, 196, 0); }
        100% { box-shadow: 0 0 0 0 rgba(26, 111, 196, 0); }
    }
    .project-box.active,
    .Embedded-box.active,
    .Tutorial-box.active,
    .Programming-box.active,
    .Articles-box.active {
        animation: boxPulse 0.5s ease both;
    }

    @keyframes mobileContentIn {
        from { opacity: 0; transform: translateY(20px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .project-modal.active,
    .Embedded-modal.active,
    .Tutorial-modal.active,
    .Programming-modal.active,
    .Articles-modal.active {
        animation: mobileContentIn 0.32s cubic-bezier(0.4, 0, 0.2, 1) both;
    }

    @keyframes footerPanelUp {
        from { opacity: 0; transform: translateY(16px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .aboutus-modal.active {
        animation: footerPanelUp 0.28s ease both;
    }

    .aboutus-box:active {
        transform: scale(0.95);
    }
    .close_button_class:active {
        transform: scale(0.93);
    }
}

/* =========================================================
   TABLET  (481px – 1000px)
   ========================================================= */
@media (min-width: 481px) and (max-width: 1000px) {

    .project-modal p,
    .Embedded-modal p,
    .Tutorial-modal p,
    .Programming-modal p,
    .Articles-modal p {
        font-size: 1.8vw;
        line-height: 1.75;
    }

    .project-modal h2,
    .Embedded-modal h2,
    .Tutorial-modal h2,
    .Programming-modal h2,
    .Articles-modal h2 {
        font-size: 2.5vw;
    }
}

/* =========================================================
   MOBILE ANIMATIONS — index page cards
   ========================================================= */
@media (max-width: 480px) {

    @keyframes cardIn {
        from { opacity: 0; transform: translateY(24px); }
        to   { opacity: 1; transform: translateY(0); }
    }
    .product {
        animation: cardIn 0.4s ease both;
    }
    .product:nth-child(1) { animation-delay: 0.05s; }
    .product:nth-child(2) { animation-delay: 0.12s; }
    .product:nth-child(3) { animation-delay: 0.19s; }
    .product:nth-child(4) { animation-delay: 0.26s; }

    .product {
        transition: transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1),
                    box-shadow 0.15s ease;
    }
    .product:active {
        transform: scale(0.97);
        box-shadow: 0 4px 16px rgba(2, 14, 56, 0.15);
    }

    .product button {
        transition: background-color 0.15s ease, transform 0.12s ease;
    }
    .product button:active {
        transform: scale(0.96);
        background-color: var(--clr-blue) !important;
    }
}

/* =========================================================
   MOBILE ANIMATIONS — header
   ========================================================= */
@media (max-width: 480px) {

    .menu_button {
        transition: background-color 0.15s ease,
                    transform 0.15s cubic-bezier(0.34, 1.56, 0.64, 1);
    }
    .menu_button:active {
        transform: scale(0.88);
        background-color: var(--clr-blue);
    }

    @keyframes dropdownSlideIn {
        from { opacity: 0; transform: translateY(-10px) scaleY(0.95); }
        to   { opacity: 1; transform: translateY(0) scaleY(1); }
    }
    .mobile_menu_dropdown.open {
        animation: dropdownSlideIn 0.22s cubic-bezier(0.34, 1.56, 0.64, 1) both;
        transform-origin: top right;
    }

    .mobile_menu_dropdown a {
        transition: background-color 0.12s ease,
                    padding-left 0.15s ease,
                    transform 0.12s ease;
        position: relative;
        overflow: hidden;
    }
    .mobile_menu_dropdown a:active {
        background-color: var(--clr-blue);
        padding-left: 9%;
        transform: scale(0.98);
    }

    #scrollToTopBtn:active {
        transform: scale(0.9);
    }
}