.df-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border: 1px solid var(--neutral-E0E0E0);
  border-radius: 3px;
  padding: 8px 10px;
  height: 36px;
  font-size: 16px;
  color: var(--neutral-4E4E4E);
  background-color: VAR(--neutral-FFFFFF);
  transition:
    color var(--transition-fast),
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.df-btn svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex-shrink: 0;
}

@media (max-width: 1400px) {
  .df-btn {
    font-size: var(--df-text-fs-14);
    padding: 6px 8px;
    height: 32px;
  }
  .df-btn svg {
    width: 18px;
    height: 18px;
  }
}

.df-btn:hover {
  color: var(--red-D11019);
  border-color: var(--red-D11019);
  background-color: var(--red-FEECED);
}

.df-btn:active {
  color: var(--neutral-FFFFFF); /* Main Color */
  background-color: var(--red-D11019); /* Color 600 */
}

.df-btn:active:hover,
.df-btn:active:focus-visible {
  background-color: var(--red-BF0D16);
}

/* Dolu (primary) varyant — aynı .df-btn ölçüsü, kırmızı zemin */
.df-btn--accent {
  background-color: var(--red-D11019);
  border-color: var(--red-D11019);
  color: var(--neutral-FFFFFF);
}
.df-btn--accent:hover {
  background-color: var(--red-BF0D16);
  border-color: var(--red-BF0D16);
  color: var(--neutral-FFFFFF);
}

/* --------------------------------------------------------------------------
   1. ICON BUTTON — Base
   -------------------------------------------------------------------------- */
.df-icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: clamp(28px,2.7vw,36px);
  min-width: clamp(28px,2.7vw,36px);
  height: clamp(28px,2.7vw,36px);
  min-height: clamp(28px,2.7vw,36px);
  border-radius: var(--radius-sm);
  border: 1px solid var(--neutral-E0E0E0);
  background: transparent;
  cursor: pointer;
  color: var(--neutral-A3A3A3);
  transition:
    color var(--transition-fast),
    background-color var(--transition-fast);
}

.df-icon-btn svg {
  width: clamp(14px,1.5vw,16px);
  min-width: clamp(14px,1.5vw,16px);
  height: clamp(14px,1.5vw,16px);
  display: block;
  fill: currentColor;
  pointer-events: none;
}

.df-icon-btn {
  color: var(--neutral-4E4E4E);
}

.df-icon-btn.is-passive,
.df-icon-btn:disabled {
  color: var(--neutral-A3A3A3) !important;
  background-color: transparent !important;
  user-select:none;
  pointer-events:none;
}

.df-icon-btn:not(.is-passive):not(:disabled):hover,
.df-icon-btn:not(.is-passive):not(:disabled):focus-visible {
  color: var(--red-D11019);
  background-color: var(--red-FEECED)
  border-color: var(--red-D11019);
  outline: none;
}

.df-icon-btn:active {
  color: var(--neutral-FFFFFF); 
  background-color: var(--red-D11019);
}

.df-icon-btn:active:hover,
.df-icon-btn:active:focus-visible {
  background-color: var(--red-BF0D16);
}

.df-icon-btn.btn-sm {
  width: 28px;
  height: 28px;
  border-radius: 4px;
}

/* --------------------------------------------------------------------------
   6. TAB BUTTONS
   -------------------------------------------------------------------------- */
.df-cert__tabs {
    gap: var(--space-3);
    flex-wrap: wrap;
    margin-bottom: var(--space-8);
}

.df-cert__tab {
    --tab-accent: var(--red-D11019);
    --tab-accent-soft: var(--red-FA9EA3);
    --tab-accent-bg: var(--tab-accent);
    --tab-shadow: var(--shadow-red);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    flex: 1 1 0;
    min-width: 120px;
    padding: var(--space-2) var(--space-4);
    background: var(--neutral-FFFFFF);
    border: 1px solid var(--neutral-E0E0E0);
    border-radius: 3px;
    font-size: var(--df-text-fs-16);
    color: var(--neutral-666666);
    text-align: center;
    white-space: nowrap;
    cursor: pointer;
    transition: all var(--transition-fast);
}
.df-cert__tab:disabled {
    opacity:.6;
    cursor:default;
}

/* data-platform verilen tab marka rengini kullanır (bkz. utilities.css) */
.df-cert__tab[data-platform] {
    --tab-accent: var(--platform-color, var(--red-D11019));
    --tab-accent-bg: var(--platform-bg, var(--red-D11019));
    --tab-accent-soft: var(--platform-color, var(--red-FA9EA3));
    --tab-shadow: var(--shadow-md);
}

.df-cert__tab svg {
    width: clamp(20px,1.4vw,28px);
    height: clamp(20px,1.4vw,28px);
    transition: color var(--transition-fast);
}

@media (min-width:992px) {
    .df-cert__tab {
        max-width: 210px;
    }
}

.df-cert__tab:not(:disabled):hover {
    border-color: var(--tab-accent-soft);
    color: var(--tab-accent);
}

.df-cert__tab:not(:disabled).active {
    background: var(--tab-accent-bg);
    border-color: var(--tab-accent);
    color: var(--neutral-FFFFFF);
}

.df-cert__tab:not(:disabled).active svg {
    color: currentColor;
}

/* --------------------------------------------------------------------------
   7. ROUND ICON BTN
   -------------------------------------------------------------------------- */

.df-round-btn {
    --rb-size: clamp(62px,7.2vw,96px);
    --rb-bg: var(--red-BF0D16);
    --rb-color: var(--neutral-FFFFFF);
    --rb-ring: 0px;
    --rb-ring-color: var(--neutral-FFFFFF);
    display: flex;
    align-items: center;
    justify-content: center;
    flex: none;
    width: var(--rb-size);
    height: var(--rb-size);
    border-radius: var(--radius-full);
    background: var(--rb-bg);
    color: var(--rb-color);
    box-shadow: 0 0 0 var(--rb-ring) #ffffff21;
    transition: transform var(--transition-base);
}

    .df-round-btn[data-platform] {
        --rb-bg: var(--platform-bg, var(--red-BF0D16));
    }

    .df-round-btn:hover {
        color: var(--rb-color);
        transform: scale(1.06);
    }

    .df-round-btn svg {
        width: 62%;
        height: 62%;
    }

/* --------------------------------------------------------------------------
   8. CUSTOM SUBMIT BTN
   -------------------------------------------------------------------------- */

.df-submit {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    width: 100%;
    padding: 16px 30px;
    border: 0;
    border-radius: var(--radius-sm);
    background: var(--red-D11019);
    color: var(--neutral-FFFFFF);
    font-size: var(--df-text-fs-16);
    font-weight: var(--fw-light);
    cursor: pointer;
    transition: background var(--transition-fast);
}

    .df-submit:hover:not(:disabled) {
        background: var(--red-980B12);
    }

    .df-submit:disabled {
        background: var(--neutral-A3A3A3);
        cursor: not-allowed;
    }