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


html {
    -webkit-text-size-adjust: 100%;
}


body {
    min-height: 100vh;

    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        Roboto,
        Helvetica,
        Arial,
        sans-serif;

    background: #f7f8fc;

    color: #1f2937;
}


/* ========================================
   HEADER
======================================== */

.site-header {
    width: 100%;

    background: #ffffff;

    border-bottom: 1px solid #e5e7eb;
}


.header-banner {
    width: 100%;

    min-height: 175px;

    padding:
        18px
        32px;

    display: flex;

    align-items: center;

    justify-content: flex-start;
}


.logo {
    display: block;

    width: 100%;

    max-width: 920px;

    text-decoration: none;
}


.site-logo-image {
    display: block;

    width: 100%;
    height: 140px;

    object-fit: contain;

    object-position: left center;
}


/* ========================================
   MAIN
======================================== */

.main-content {
    width: 100%;
}


.hero {
    padding:
        90px
        24px
        100px;
}


.hero-container {
    width: 100%;

    max-width: 850px;

    margin: 0 auto;

    text-align: center;
}


/* ========================================
   HERO
======================================== */

.eyebrow {
    margin-bottom: 28px;

    color: #5146e5;

    font-size: 16px;

    font-weight: 750;

    letter-spacing: 4px;
}


.hero h1 {
    margin-bottom: 30px;

    color: #1f2937;

    font-size: clamp(
        44px,
        6vw,
        68px
    );

    line-height: 1.05;

    font-weight: 800;

    letter-spacing: -2px;
}


.hero-description {
    max-width: 760px;

    margin:
        0
        auto
        55px;

    color: #6b7280;

    font-size: 21px;

    line-height: 1.7;
}


/* ========================================
   CONVERTER TABS
======================================== */

.converter-tabs {
    display: flex;

    width: 100%;

    max-width: 520px;

    margin:
        0
        auto
        32px;

    overflow: hidden;

    border-radius: 18px;

    background: #e5e7eb;
}


.converter-tabs[hidden] {
    display: none;
}


.converter-tab {
    flex: 1;

    min-height: 76px;

    border: 0;

    background: transparent;

    color: #374151;

    font-family: inherit;

    font-size: 19px;

    cursor: pointer;

    transition:
        background 0.2s ease,
        color 0.2s ease;
}


.converter-tab.active {
    background: #5146e5;

    color: #ffffff;
}


.converter-tab:disabled {
    cursor: not-allowed;

    opacity: 0.7;
}


/* ========================================
   UPLOAD AREA
======================================== */

.upload-area {
    width: 100%;

    max-width: 720px;

    min-height: 610px;

    margin: 0 auto;

    padding:
        70px
        40px
        50px;

    background: #ffffff;

    border: 3px dashed #5952c9;

    border-radius: 32px;

    box-shadow:
        0 15px 40px
        rgba(31, 41, 55, 0.06);

    text-align: center;

    transition:
        border-color 0.2s ease,
        background 0.2s ease;
}


.upload-area[hidden] {
    display: none;
}


.upload-area.dragging {
    border-color: #4338ca;

    background: #f5f3ff;
}


.upload-icon {
    margin-bottom: 40px;

    color: #5146e5;

    font-size: 60px;

    line-height: 1;
}


.upload-area h2 {
    max-width: 600px;

    margin:
        0
        auto
        14px;

    overflow-wrap: anywhere;

    color: #1f2937;

    font-size: 32px;

    line-height: 1.25;

    font-weight: 750;
}


.upload-description {
    margin-bottom: 26px;

    color: #737983;

    font-size: 20px;

    line-height: 1.5;
}


.or-text {
    margin-bottom: 27px;

    color: #9ca3af;

    font-size: 20px;
}


/* ========================================
   CHOOSE FILE
======================================== */

.choose-file-button {
    display: inline-flex;

    min-width: 240px;

    min-height: 72px;

    align-items: center;

    justify-content: center;

    padding:
        15px
        30px;

    border-radius: 17px;

    background: #5146e5;

    color: #ffffff;

    font-size: 20px;

    font-weight: 700;

    cursor: pointer;

    transition:
        transform 0.15s ease,
        background 0.15s ease;
}


.choose-file-button:hover {
    background: #4338ca;
}


.choose-file-button:active {
    transform: scale(0.98);
}


.file-limit {
    margin-top: 30px;

    color: #737983;

    font-size: 17px;
}


/* ========================================
   CONVERT BUTTON
======================================== */

.convert-button {
    display: block;

    min-width: 250px;

    min-height: 72px;

    margin:
        35px
        auto
        0;

    padding:
        15px
        32px;

    border: 0;

    border-radius: 17px;

    background: #111827;

    color: #ffffff;

    font-family: inherit;

    font-size: 20px;

    font-weight: 700;

    cursor: pointer;

    transition:
        transform 0.15s ease,
        background 0.15s ease,
        opacity 0.15s ease;
}


.convert-button:hover {
    background: #030712;
}


.convert-button:active {
    transform: scale(0.98);
}


.convert-button:disabled {
    cursor: not-allowed;

    opacity: 0.75;
}


/* ========================================
   PROGRESS
======================================== */

.progress-container {
    width: 100%;

    max-width: 440px;

    margin:
        28px
        auto
        0;
}


.progress-container[hidden] {
    display: none;
}


.progress-header {
    margin-bottom: 11px;

    text-align: left;

    color: #374151;

    font-size: 14px;

    font-weight: 650;
}


.progress-track {
    position: relative;

    width: 100%;

    height: 8px;

    overflow: hidden;

    background: #e5e7eb;

    border-radius: 999px;
}


.progress-bar {
    position: absolute;

    top: 0;
    bottom: 0;

    left: -24%;

    width: 24%;

    background: #5146e5;

    border-radius: 999px;

    animation:
        conversion-progress
        1.25s
        cubic-bezier(0.4, 0, 0.2, 1)
        infinite;

    box-shadow:
        0 0 8px
        rgba(81, 70, 229, 0.22);
}


.progress-note {
    margin-top: 10px;

    text-align: left;

    color: #9ca3af;

    font-size: 13px;
}


@keyframes conversion-progress {

    0% {
        left: -24%;
    }

    100% {
        left: 100%;
    }

}


/* ========================================
   STATUS
======================================== */

.status-message {
    min-height: 28px;

    margin-top: 25px;

    color: #6b7280;

    font-size: 16px;

    line-height: 1.5;
}


.status-message.success {
    color: #166534;
}


.status-message.error {
    color: #b91c1c;
}


/* ========================================
   SUCCESS SCREEN
======================================== */

.success-area {
    width: 100%;

    max-width: 720px;

    min-height: 500px;

    margin: 0 auto;

    padding:
        65px
        45px;

    background: #ffffff;

    border: 1px solid #e5e7eb;

    border-radius: 32px;

    box-shadow:
        0 15px 40px
        rgba(31, 41, 55, 0.07);

    text-align: center;
}


.success-area[hidden] {
    display: none;
}


.success-check {
    display: flex;

    width: 72px;
    height: 72px;

    margin:
        0
        auto
        25px;

    align-items: center;

    justify-content: center;

    border-radius: 50%;

    background: #ecfdf3;

    color: #15803d;

    font-size: 38px;

    font-weight: 700;
}


.success-area h2 {
    margin-bottom: 12px;

    color: #111827;

    font-size: 32px;

    font-weight: 750;
}


.success-description {
    margin-bottom: 30px;

    color: #6b7280;

    font-size: 17px;
}


.converted-file {
    display: flex;

    width: 100%;

    max-width: 480px;

    margin:
        0
        auto
        32px;

    padding: 18px;

    align-items: center;

    gap: 15px;

    background: #f9fafb;

    border: 1px solid #e5e7eb;

    border-radius: 14px;

    text-align: left;
}


.converted-file-icon {
    display: flex;

    width: 44px;
    height: 44px;

    flex-shrink: 0;

    align-items: center;

    justify-content: center;

    border-radius: 10px;

    background: #eef2ff;

    color: #5146e5;

    font-size: 20px;

    font-weight: 800;
}


.converted-file-info {
    min-width: 0;

    display: flex;

    flex-direction: column;

    gap: 3px;
}


.converted-label {
    color: #9ca3af;

    font-size: 12px;
}


.converted-file-info strong {
    overflow: hidden;

    color: #1f2937;

    font-size: 15px;

    text-overflow: ellipsis;

    white-space: nowrap;
}


.download-again-button {
    display: block;

    width: 100%;

    max-width: 330px;

    min-height: 64px;

    margin:
        0
        auto
        14px;

    padding:
        14px
        25px;

    border: 0;

    border-radius: 15px;

    background: #5146e5;

    color: #ffffff;

    font-family: inherit;

    font-size: 18px;

    font-weight: 700;

    cursor: pointer;
}


.download-again-button:hover {
    background: #4338ca;
}


.convert-another-button {
    display: block;

    width: 100%;

    max-width: 330px;

    min-height: 58px;

    margin: 0 auto;

    padding:
        12px
        25px;

    border: 1px solid #d1d5db;

    border-radius: 15px;

    background: #ffffff;

    color: #374151;

    font-family: inherit;

    font-size: 16px;

    font-weight: 650;

    cursor: pointer;
}


.convert-another-button:hover {
    background: #f9fafb;
}


/* ========================================
   FOOTER
======================================== */

.site-footer {
    width: 100%;

    padding:
        45px
        20px;

    background: #ffffff;

    border-top: 1px solid #e5e7eb;
}


.footer-container {
    max-width: 1100px;

    margin: 0 auto;

    text-align: center;
}


.footer-logo-image {
    width: 220px;
    height: 58px;

    object-fit: contain;

    margin-bottom: 12px;
}


.footer-tagline {
    margin-bottom: 15px;

    color: #6b7280;

    font-size: 14px;
}


.footer-copyright {
    color: #9ca3af;

    font-size: 13px;
}


/* ========================================
   TABLET
======================================== */

@media (max-width: 768px) {

    .header-banner {
        min-height: 150px;

        padding:
            16px
            24px;
    }


    .logo {
        max-width: 720px;
    }


    .site-logo-image {
        height: 115px;
    }


    .hero {
        padding:
            70px
            24px
            80px;
    }


    .eyebrow {
        font-size: 14px;

        letter-spacing: 3px;
    }


    .hero h1 {
        font-size: 50px;
    }


    .hero-description {
        font-size: 19px;
    }


    .converter-tab {
        min-height: 68px;

        font-size: 18px;
    }


    .upload-area {
        min-height: 580px;

        padding:
            60px
            32px
            45px;

        border-radius: 28px;
    }


    .upload-area h2 {
        font-size: 29px;
    }

}


/* ========================================
   PHONE
======================================== */

@media (max-width: 520px) {

    .header-banner {
        min-height: 125px;

        padding:
            12px
            16px;
    }


    .logo {
        max-width: 100%;
    }


    .site-logo-image {
        width: 100%;
        height: 95px;

        object-position: left center;
    }


    .hero {
        padding:
            58px
            18px
            65px;
    }


    .eyebrow {
        margin-bottom: 22px;

        font-size: 12px;

        letter-spacing: 2.5px;
    }


    .hero h1 {
        margin-bottom: 24px;

        font-size: 42px;

        letter-spacing: -1px;
    }


    .hero-description {
        margin-bottom: 42px;

        font-size: 17px;

        line-height: 1.65;
    }


    .converter-tabs {
        margin-bottom: 25px;

        border-radius: 15px;
    }


    .converter-tab {
        min-height: 62px;

        padding:
            10px
            8px;

        font-size: 16px;
    }


    .upload-area {
        min-height: 540px;

        padding:
            52px
            22px
            38px;

        border-width: 2px;

        border-radius: 25px;
    }


    .upload-icon {
        margin-bottom: 32px;

        font-size: 52px;
    }


    .upload-area h2 {
        font-size: 26px;
    }


    .upload-description {
        font-size: 17px;
    }


    .or-text {
        font-size: 18px;
    }


    .choose-file-button {
        width: 100%;

        max-width: 250px;

        min-width: 0;

        min-height: 64px;

        font-size: 18px;
    }


    .file-limit {
        font-size: 15px;
    }


    .convert-button {
        width: 100%;

        max-width: 250px;

        min-width: 0;

        min-height: 64px;

        font-size: 18px;
    }


    .progress-container {
        max-width: 300px;
    }


    .success-area {
        min-height: 460px;

        padding:
            50px
            22px;

        border-radius: 25px;
    }


    .success-area h2 {
        font-size: 28px;
    }


    .converted-file {
        padding: 15px;
    }


    .download-again-button,
    .convert-another-button {
        max-width: 100%;
    }


    .footer-logo-image {
        width: 190px;
        height: 50px;
    }

}


/* ========================================
   VERY SMALL PHONES
======================================== */

@media (max-width: 360px) {

    .header-banner {
        min-height: 110px;
    }


    .site-logo-image {
        height: 82px;
    }


    .hero h1 {
        font-size: 37px;
    }

}


/* ========================================
   REDUCED MOTION
======================================== */

@media (prefers-reduced-motion: reduce) {

    .progress-bar {
        left: 0;

        width: 24%;

        animation: none;
    }

}